博客
关于我
强烈建议你试试无所不能的chatGPT,快点击我
Shell习题100例
阅读量:4572 次
发布时间:2019-06-08

本文共 76756 字,大约阅读时间需要 255 分钟。

每日一文件

https://github.com/aminglinux/shell100/blob/master/

要求:安照这样的日期格式(xxxx-xx-xx)每日生成一个文件,如生成的文件为2017-12-20.log,并且把磁盘的使用情况写到这个文件中,提示:date、df

[root@centos-04 tmp]# date2018年 12月 26日 星期三 19:29:13 CST[root@centos-04 tmp]# date +%Y2018[root@centos-04 tmp]# date +%y18[root@centos-04 tmp]# date +%d26[root@centos-04 tmp]# date +%m12[root@centos-04 tmp]# date +%H19[root@centos-04 tmp]# date +%M30[root@centos-04 tmp]# date +%S52[root@centos-04 tmp]# date +%s1545823854[root@centos-04 tmp]# date +%F2018-12-26[root@centos-04 tmp]# date +%T19:31:04[root@centos-04 tmp]#
[root@centos-04 tmp]# date +%w3[root@centos-04 tmp]# date +%W52[root@centos-04 tmp]#

昨天日期

[root@centos-04 tmp]# date -d "-1 day" +%F2018-12-25[root@centos-04 tmp]#

上一小时

[root@centos-04 tmp]# date -d "-1 hours" +%T18:34:54[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 1.sh#!/bin/bashd=`date +%F`df -h > $d.log~                [root@centos-04 tmp]# sh 1.sh [root@centos-04 tmp]# ls1.sh            ansible-ssh-192.168.242.130-22-root  ansible-ssh-192.168.242.133-22-root  lua_uwpzx3       tmp.SLBPtZ45L92018-12-26.log  ansible-ssh-192.168.242.131-22-root  elasticsearch.4Kw1U8qo               nginx_proxy_tmp456.log         ansible-ssh-192.168.242.132-22-root  hsperfdata_root                      proxy.log[root@centos-04 tmp]# [root@centos-04 tmp]# cat 2018-12-26.log 文件系统                 容量  已用  可用 已用% 挂载点/dev/mapper/centos-root   18G  6.2G   12G   36% /devtmpfs                 898M     0  898M    0% /devtmpfs                    910M     0  910M    0% /dev/shmtmpfs                    910M   30M  881M    4% /runtmpfs                    910M     0  910M    0% /sys/fs/cgroup/dev/sda1                497M  167M  331M   34% /boottmpfs                    182M     0  182M    0% /run/user/0overlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/ffa13b95ae63f2954be362511c25724d5b854201e405eb4913b54b80e9cf6617/mergedshm                       64M     0   64M    0% /var/lib/docker/containers/f42d989248587138ac2094003ae274467518b1a15d8ead51664cc03ea0c94e59/shmoverlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/53a9f09976bd64507e995cffd443f1e151fddd88c266afc416d0fb90cb90de14/mergedoverlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/35bdef03d5af944aa5b87ee4d0ca692a6d4b6394f94633f26ebc78e664ca3150/mergedshm                       64M     0   64M    0% /var/lib/docker/containers/e6060a8f50ed0c2455e55ae466f101226d2668a28d8e19070bf4f6b2b3c6dd73/shmshm                       64M     0   64M    0% /var/lib/docker/containers/c58be577ba9f3351c23c5d1d1ec9661f129aa109735d42046a9e9e465a787306/shm[root@centos-04 tmp]#   

改进版

d=`date +%F`   #获取当前日期dir=/data/logs/disklog  #指定日志文件生成的目录if [ ! -d $dir ]  #判断如果没有目录创建then    mkdir -p $dirfidf -h > $dir/$d.log  #将硬盘信息写到日志find $dir/ -mtime +365 |xargs rm  #删除一年之前的文件

统计IP访问量  

awk '{print $3}' access_log.2018122918 |sort -n|uniq -c|sort -n -r|less
[root@centos-04 tmp]# vim 2.sh#!/bin/bashawk '{print $3}' access_log.2018122918 |sort -n|uniq -c|sort -n -r[root@centos-04 tmp]# sh 2.sh

统计内存占用之和

ps aux|sed '1d' (删除结果中第一行)
[root@centos-04 tmp]# vim 3.sh#!/bin/bashsum=0for n in `ps aux |grep -v 'TIME COMMAND' |awk '{print $6}'`do        sum=$[$sum+$n]doneecho $sum [root@centos-04 tmp]# sh 3.sh 114892[root@centos-04 tmp]# free                  total        used        free      shared  buff/cache   availableMem:        1863224      104260     1610364        9976      148600     1593352Swap:             0           0           0[root@centos-04 tmp]#

检测机器存活

[root@centos-04 tmp]# ping -c2 www.baidu.com|grep 'packet' |awk -F '%' '{print $1}' |awk '{print $NF}'0[root@centos-04 tmp]#
[root@centos-04 tmp]# vim mail.py#!/usr/bin/env python#-*- coding: UTF-8 -*-import os,sysreload(sys)sys.setdefaultencoding('utf8')import getoptimport smtplibfrom email.MIMEText import MIMETextfrom email.MIMEMultipart import MIMEMultipartfrom  subprocess import *def sendqqmail(username,password,mailfrom,mailto,subject,content):    gserver = 'smtp.qq.com'    gport = 25    try:        # msg = MIMEText(unicode(content).encode('utf-8')) //如果发送的邮件有乱码,可以尝试把这行改成如下:        msg = MIMEText(content,'plan','utf-8')         msg['from'] = mailfrom        msg['to'] = mailto        msg['Reply-To'] = mailfrom        msg['Subject'] = subject        smtp = smtplib.SMTP(gserver, gport)        smtp.set_debuglevel(0)        smtp.ehlo()        smtp.login(username,password)        smtp.sendmail(mailfrom, mailto, msg.as_string())        smtp.close()    except Exception,err:        print "Send mail failed. Error: %s" % errdef main():    to=sys.argv[1]    subject=sys.argv[2]    content=sys.argv[3]##定义QQ邮箱的账号和密码,你需要修改成你自己的账号和密码(请不要把真实的用户名和密码放到网上公开,否则你会死的很惨)    sendqqmail('1234567@qq.com','aaaaaaaaaa','1234567@qq.com',to,subject,content)if __name__ == "__main__":    main()        #####脚本使用说明#######1. 首先定义好脚本中的邮箱账号和密码#2. 脚本执行命令为:python mail.py 目标邮箱 "邮件主题" "邮件内容"
[root@centos-04 tmp]# vim 4.sh
#!/bin/bashn=`ping -c5 www.baidu.com|grep 'packet' |awk -F '%' '{print $1}' |awk '{print $FN}'`if [ -z "$n" ]then        echo "脚本有问题。"        exitelse        n1=`echo $n|sed 's/[0-9]//g'`        if [ -n "$n" ]        then                echo "脚本$0有问题。"                exit        fifim=123@qq.comwhile :do        if [ $n -ge 50 ]        then                python mail.py $m "机器宕机" "丢包率$n%"        fi        sleep 30done

批量改文件名

[root@centos-04 tmp]# cp -r /123/  /123.bak
[root@centos-04 tmp]# tar -tf 123.tar.gz
[root@centos-04 tmp]# vim 5.sh #!/bin/bashfind /123/ -type f -name "*.txt" > /tmp/txt.listfor f in `cat /tmp/txt.list`do        mv $f $f.bakdone#find /123/ -type f -name *.txt |xargs -i mv {} {}.bak#find /123/ -type f -name *.txt -exec mv {} {}.bak \;for f in `cat /tmp/txt.list`do        echo $f.bakdone > /tmp/txt.bak.listtar -czvf 123.tar.gz `cat /tmp/txt.bak.list |xargs`for f in `cat /tmp/txt.list`do        mv $f.bak $fdone
[root@centos-04 tmp]# rsync -av /123.bak/ /123/

检测80端口

[root@centos-04 tmp]# netstat -lntp |grep 80tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      6938/nginx: master  tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      6938/nginx: master  tcp        0      0 0.0.0.0:8000            0.0.0.0:*               LISTEN      6938/nginx: master  [root@centos-04 tmp]# netstat -lntp |grep ':80 'tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      6938/nginx: master  [root@centos-04 tmp]#
[root@centos-04 tmp]# yum install -y nmap[root@centos-04 tmp]# nmap -p 80 127.0.0.1Starting Nmap 6.40 ( http://nmap.org ) at 2019-01-04 03:29 CSTNmap scan report for localhost (127.0.0.1)Host is up (0.00011s latency).PORT   STATE SERVICE80/tcp open  httpNmap done: 1 IP address (1 host up) scanned in 0.04 seconds[root@centos-04 tmp]#

[root@centos-04 tmp]# vim 6.sh 
#!/bin/bashm=123@123.comwhile :do        n=`netstat -lntp |grep ':80 '|wc -l`        if [ $n -eq 0 ]        then                /usr/local/apache2/bin/apachectl -k restart 2>/tmp/apache.err                python mail.py $m "80端口关闭" "已经重启httpd服务"                pn=`pgrep -l httpd|wc -l`                if [ $pn -eq 0 ]                then                        python mail.py $m "httpd重启失败" "`head -1 /tmp/apache.err`"        fi        sleep 30done

也可以用nohup或screen这screen里执行6.sh

[root@centos-04 tmp]# nohup sh 6.sh &
[root@centos-04 tmp]# nmap -p 80 127.0.0.1 |grep '80/tcp' |awk '{print $2}' (用nmap写法)open[root@centos-04 tmp]#

备份数据库

[root@centos-04 tmp]# vim 7.sh#!/bin/bashd1=`date +%w`d2=`date +%d`local_backdir=/bak/mysqlremote_backdir=192.168.242.130::backupexec 1> /tmp/mysqlbak.log 2>/tmp/mysqlbak.errecho "mysql backup begin at `date`"mysqldump -uroot -pxxx discuz > $local_backdir/discuz.sql.$d1rsync -az $local_backdir/discuz.sql.$d1 $remote_backdir/discuz.sql.$d2echo "mysql backup end at `date`"

 检测502

1.502的情况:php配置有问题、php脚本耗资源。

[root@centos-04 tmp]# vim 8.sh#!/bin/bashlog=/data/log/access.logwhile :do502_n=`tail -n 300 $log |grep -c ' 502 '`if [ -z "$502_n" ]then        exitfiif [ $502_n -gt 100 ]then        /etc/init.d/php-fpm restart >/dev/null 2>/tmp/php-fpm.err        fpm_p_n=`pgrep -l php-fpm|wc -l`        if [ $fpm_p_n -eq 0 ]        then                python mail.py xxx@xx.com "php-fpm err" "head -1 /tmp/php-fpm.err"                exit        fifisleep 10done

删除字母和行

1.删除前五行中包含字母的行

[root@centos-04 tmp]# head -n5 test.sql |sed '/[a-zA-Z]/d'

2.查看文件前5行

[root@centos-04 tmp]# sed -n '1,5'p mail.py #!/usr/bin/env python#-*- coding: UTF-8 -*-import os,sysreload(sys)sys.setdefaultencoding('utf8')[root@centos-04 tmp]#

3.把6到10行中的全部字母删掉

[root@centos-04 tmp]# vim 9.sh#!/bin/bashsed -n '1,5'p 1.txt|sed '/[a-zA-Z]/d'sed '1,5d' 1.txt |sed '1,5s/[a-zA-Z]//g'

找单词

[root@centos-04 tmp]# for w in Bash also interprets a number of multi-character options.; do echo $w; doneBashalsointerpretsanumberofmulti-characteroptions.[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 10.sh#!/bin/bashc="Bash also interprets a number of multi-character options."n=`echo $c|awk -F '[ +-.]' '{print NF}'`for ((i=1;i<$n;i++))do        l=`echo $c|awk -F '[ +-.]' -v j=$i '{print $j}'|wc -L`        if [ $l -lt 6 ]        then                echo $c|awk -F '[ +-.]' -v j=$i '{print $j}'        fidone[root@centos-04 tmp]# sh 10.sh Bashalsoaofmulti[root@centos-04 tmp]#

输入数字执行命令  

 

[root@centos-04 tmp]# vim 11.sh#!/bin/bashecho "*cmd meau** 1 - date 2 - ls 3 - who 4 - pwd"read -p "Please input a number:" nif [ -z "$n" ]then        echo "请输入一纯数字,范围1-4。"      exitfin1=`echo $n|sed 's/[0-9]//g'`if [ -n "$n1" ]then        echo "请输入一个纯数字,范围1-4。"        exitficase $n in        1)        date        ;;        2)        ls        ;;        3)        who        ;;        4)        pwd        ;;        *)        echo "请输入1-4的数字"        ;;esac[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:12019年 01月 04日 星期五 21:43:35 CST[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:210.sh  11.sh  1.sh  2018-12-26.log  2.sh  3.sh  456.log  4.sh  5.sh  6.sh  7.sh  8.sh  9.sh  mail.py  test.sql  tmp.SzNhh17qiE[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:3root     pts/1        2019-01-04 18:26 (192.168.242.1)[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:4       /tmp[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:5请输入1-4的数字[root@centos-04 tmp]# sh 11.sh *cmd meau** 1 - date 2 - ls 3 - who 4 - pwdPlease input a number:fsaf请输入一个纯数字,范围1-4。[root@centos-04 tmp]#

批量创建用户

[root@centos-04 tmp]# seq -w 00 0900010203040506070809[root@centos-04 tmp]# seq 0 9     0123456789[root@centos-04 tmp]#     

给用户添加密码

[root@centos-04 tmp]# useradd user1[root@centos-04 tmp]# passwd user1更改用户 user1 的密码 。新的 密码:无效的密码: 密码少于 7 个字符重新输入新的 密码:passwd:所有的身份验证令牌已经成功更新。[root@centos-04 tmp]#

在脚本中自动给用户添加密码两种方式

[root@centos-04 tmp]# echo -e "user1\nuser1\n" |passwd user1更改用户 user1 的密码 。新的 密码:无效的密码: 密码少于 7 个字符重新输入新的 密码:passwd:所有的身份验证令牌已经成功更新。[root@centos-04 tmp]# echo "user1" |passwd --stdin user1更改用户 user1 的密码 。passwd:所有的身份验证令牌已经成功更新。[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 12.sh#!/bin/bashfor i in `seq -w 00 09`do        useradd user_$i        p=`mkpasswd -l 10 -s 0`        echo "user_$i $p" >> /tmp/pass.tmp        echo $p |passwd --stdin user_$idone[root@centos-04 tmp]# sh 12.sh 更改用户 user_00 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_01 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_02 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_03 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_04 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_05 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_06 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_07 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_08 的密码 。passwd:所有的身份验证令牌已经成功更新。更改用户 user_09 的密码 。passwd:所有的身份验证令牌已经成功更新。[root@centos-04 tmp]#
[root@centos-04 tmp]# tail /etc/passwduser_00:x:1001:1001::/home/user_00:/bin/bashuser_01:x:1002:1002::/home/user_01:/bin/bashuser_02:x:1003:1003::/home/user_02:/bin/bashuser_03:x:1004:1004::/home/user_03:/bin/bashuser_04:x:1005:1005::/home/user_04:/bin/bashuser_05:x:1006:1006::/home/user_05:/bin/bashuser_06:x:1007:1007::/home/user_06:/bin/bashuser_07:x:1008:1008::/home/user_07:/bin/bashuser_08:x:1009:1009::/home/user_08:/bin/bashuser_09:x:1010:1010::/home/user_09:/bin/bash[root@centos-04 tmp]# cat /tmp/pass.tmp user_00 8xiwgZSce6user_01 yaMp6cb2gAuser_02 jx0QtlL2fwuser_03 69bwuqgEDfuser_04 p3fpvMMl9cuser_05 fm5Bv4Xssxuser_06 ivx69zVIpyuser_07 l77CvxvuHyuser_08 MZfmi6kx4fuser_09 4bAkzeaKa6[root@centos-04 tmp]#

登录测试(复制user_00的密码粘贴密码登录成功)

[root@centos-04 ~]# ssh user_00@192.168.242.130user_00@192.168.242.130's password: Last login: Sat Jan  5 00:00:28 2019[user_00@centos-04 ~]$   

删掉刚刚创建的用户

[root@centos-04 tmp]# for i in `seq -w 00 09`;do userdel -r user_$i; done[root@centos-04 tmp]# tail /etc/passwdtcpdump:x:72:72::/:/sbin/nologinrpc:x:32:32:Rpcbind Daemon:/var/lib/rpcbind:/sbin/nologinrpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologinnfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologinhaproxy:x:188:188:haproxy:/var/lib/haproxy:/sbin/nologindockerroot:x:994:991:Docker User:/var/lib/docker:/sbin/nologinepmd:x:993:990:Erlang Port Mapper Daemon:/tmp:/sbin/nologinrabbitmq:x:992:989:RabbitMQ messaging server:/var/lib/rabbitmq:/bin/bashuser1:x:1000:1000::/home/user1:/bin/bash

监控httpd进程  

[root@centos-04 tmp]# vim 13.sh #!/bin/bashcheck_service(){        c=0        for i in `seq 1 5`        do        /usr/local/apache2/bin/apachectl -k restart 2> /tmp/httpd.err        if [ ! $? -eq 0 ]        then           c=$[$c+1]        else           break        fi        done        if [ $c -eq 5 ]        then        python mail.py "123@qq.com " "apache进程数量大于500,重启失败。" "`head -1 /tmp/httpd.err`"        exit        fi}while :do        n=`ps -C httpd --no-heading|wc -l`        if [ $n -ge 500 ]        then                check_service                sleep 60                n_new=`ps -C httpd --no-heading|wc -l`                if [ $n_new -ge 500 ]                then                        python mail.py "123@qq.com " "apache重启一分钟后进程数量仍然大于500" "请登录服务器排查问题"                        exit                fi        fisleep 10done

封ip  

[root@centos-04 logs]# tail access.log 127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/replicationcontrollers?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/services?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/apps/v1beta1/statefulsets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/storage.k8s.io/v1/storageclasses?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/ a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/persistentvolumes?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/policy/v1beta1/poddisruptionbudgets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/ a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/extensions/v1beta1/replicasets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/nodes?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/persistentvolumeclaims?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:50 +0800] "GET /api/v1/pods?fieldSelector=status.phase%21%3DFailed%2Cstatus.phase%21%3DSucceeded&limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" " kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"[root@centos-04 logs]# [root@centos-04 logs]# egrep '2018:23:46:[0-9]+' access.log |tail (这里使用egrep,因为正则中有+号)127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/replicationcontrollers?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/services?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/apps/v1beta1/statefulsets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/storage.k8s.io/v1/storageclasses?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/ a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/persistentvolumes?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/policy/v1beta1/poddisruptionbudgets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/ a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /apis/extensions/v1beta1/replicasets?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/nodes?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"127.0.0.1 - - [19/Dec/2018:23:46:49 +0800] "GET /api/v1/persistentvolumeclaims?limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/ scheduler"127.0.0.1 - - [19/Dec/2018:23:46:50 +0800] "GET /api/v1/pods?fieldSelector=status.phase%21%3DFailed%2Cstatus.phase%21%3DSucceeded&limit=500&resourceVersion=0 HTTP/1.1" 404 169 "-" "kube-scheduler/v1.11.3 (linux/amd64) kubernetes/a452946/scheduler"[root@centos-04 logs]#   

求出上一分钟时间

[root@centos-04 logs]# echo `date -d "-1 min" +%Y:%H:%M`2019:01:39[root@centos-04 logs]# date2019年 01月 05日 星期六 01:40:53 CST[root@centos-04 logs]#

查看iptables (pkts有多少个数据包,bytes有多少字节)

[root@centos-04 tmp]# iptables -nvLChain INPUT (policy ACCEPT 6947 packets, 5761K bytes) pkts bytes target     prot opt in     out     source               destination         Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target     prot opt in     out     source               destination            46 86418 DOCKER-ISOLATION  all  --  *      *       0.0.0.0/0            0.0.0.0/0              46 86418 DOCKER     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0              44 86298 ACCEPT     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED    0     0 ACCEPT     all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0               2   120 ACCEPT     all  --  docker0 docker0  0.0.0.0/0            0.0.0.0/0           Chain OUTPUT (policy ACCEPT 5072 packets, 1722K bytes) pkts bytes target     prot opt in     out     source               destination         Chain DOCKER (1 references) pkts bytes target     prot opt in     out     source               destination             0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.2           tcp dpt:3306    0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.3           tcp dpt:9000    0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.4           tcp dpt:80Chain DOCKER-ISOLATION (1 references) pkts bytes target     prot opt in     out     source               destination            46 86418 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           [root@centos-04 tmp]#
[root@centos-04 tmp]# iptables -I INPUT -p tcp --dport 80 -s 1.1.1.1 -j REJECT (封掉1.1.1.1)[root@centos-04 tmp]# iptables -nvLChain INPUT (policy ACCEPT 55 packets, 3968 bytes) pkts bytes target     prot opt in     out     source               destination             0     0 REJECT     tcp  --  *      *       1.1.1.1              0.0.0.0/0            tcp dpt:80 reject-with icmp-port-unreachableChain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target     prot opt in     out     source               destination            46 86418 DOCKER-ISOLATION  all  --  *      *       0.0.0.0/0            0.0.0.0/0              46 86418 DOCKER     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0              44 86298 ACCEPT     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED    0     0 ACCEPT     all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0               2   120 ACCEPT     all  --  docker0 docker0  0.0.0.0/0            0.0.0.0/0           Chain OUTPUT (policy ACCEPT 34 packets, 3144 bytes) pkts bytes target     prot opt in     out     source               destination         Chain DOCKER (1 references) pkts bytes target     prot opt in     out     source               destination             0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.2           tcp dpt:3306    0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.3           tcp dpt:9000    0     0 ACCEPT     tcp  --  !docker0 docker0  0.0.0.0/0            172.17.0.4           tcp dpt:80Chain DOCKER-ISOLATION (1 references) pkts bytes target     prot opt in     out     source               destination            46 86418 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           [root@centos-04 tmp]#
#!/bin/bashblock_ip{t1=`date -d "-1 min" +%Y:%H:%M`log/data/logs/access_logegrep "$t1:[0-9]+" $log > /tmp/tmp_last_min.logawk '{print $1}' /tmp/tmp_last_min.log |sort -n |uniq -c|sort -n |awk '$1>100 {print $2}' > /tmp/bad_ip.listn=`wc -l /tmp/bad_ip.list|awk '{print $1}'`if [ $n -ne 0 ]then        for ip in `cat /tmp/bad_ip.list`        do                iptables -I INPUT -s $ip -j REJECT        donefi}unblock_ip(){        iptables -nvL INPUT |sed '1d' |awk '$1<5 {print $8}' > /tmp/good_ip.list        n=`wc -l /tmp/good_ip.list|awk '{print $1}'`        if [ $n -ne 0 ]        then        for ip in `cat /tmp/good_ip.list`        do                iptables -D INPUT -s $ip -j REJECT        done        fi        iptables -Z}t=`date +%M`if [ $t == "00" ] || [ $t == "30" ]then        unblock_ip        block_ipelse            block_ipfi
[root@centos-04 tmp]# vim 14.sh

将该脚本放到计划任务中每分钟执行一次

 算数字

[root@centos-04 tmp]# vim 15.sh#!/bin/bashx=10y=21for i in `seq 0 15`; do echo $x;x=$[$x+$y]z=$[2**$i] (求幂)y=$[$y+$z]done[root@centos-04 tmp]# sh 15.sh 1031537710514119327742570112332277434584611667333077

查用户 

获取linux版本

[root@centos-04 tmp]# awk -F 'release ' '{print $2}' /etc/redhat-release |cut -d '.' -f17[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 16.sh#!/bin/bashv=`awk -F 'release ' '{print $2}' /etc/redhat-release |cut -d '.' -f1`user(){        if [ $1 -eq 0 ]        then                echo "系统没有自定义的用户"        else                echo "系统存在自定义用户。有$1个"        fi}case $v in        5|6)        n=`awk -F ':' '$3>=500' /etc/passwd|wc -l`        user $n        ;;        7)        n=`awk -F ':' '$3>=1000' /etc/passwd|wc -l`        user $n        ;;        *)        echo "脚本出错"        ;;esac[root@centos-04 tmp]# sh 16.sh 系统存在自定义用户。有3个[root@centos-04 tmp]#
[root@centos-04 tmp]# awk -F ':' '$3 >= 1000' /etc/passwd nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologinuser1:x:1000:1000::/home/user1:/bin/bashuser_00:x:1001:1001::/home/user_00:/bin/bash[root@centos-04 tmp]#

检测磁盘

查看空间使用量和inode使用量

[root@centos-04 tmp]# df[root@centos-04 tmp]# df -i
[root@centos-04 tmp]# df |awk '{print $5}'已用%36%0%0%2%0%34%36%0%36%0%36%0%0%[root@centos-04 tmp]# df |awk '{print $5}'|sed 's/%//'已用360020343603603600[root@centos-04 tmp]#

去除标头、解决有小数点的情况

[root@centos-04 tmp]# df|sed '1d' |awk '{print $5}'|sed 's/%//'|cut -d '.' -f1360020343603603600[root@centos-04 tmp]#

最终获取大于85的命令

[root@centos-04 tmp]# df|sed '1d' |awk -F ' +|%' '$5>85 {print $7}' [root@centos-04 tmp]#
[root@centos-04 tmp]# df|sed '1d' |awk -F ' +|%' '$5<85 {print $7}' //dev/dev/shm/run/sys/fs/cgroup/boot/var/lib/docker/overlay2/ffa13b95ae63f2954be362511c25724d5b854201e405eb4913b54b80e9cf6617/merged/var/lib/docker/containers/f42d989248587138ac2094003ae274467518b1a15d8ead51664cc03ea0c94e59/shm/var/lib/docker/overlay2/53a9f09976bd64507e995cffd443f1e151fddd88c266afc416d0fb90cb90de14/merged/var/lib/docker/containers/c58be577ba9f3351c23c5d1d1ec9661f129aa109735d42046a9e9e465a787306/shm/var/lib/docker/overlay2/35bdef03d5af944aa5b87ee4d0ca692a6d4b6394f94633f26ebc78e664ca3150/merged/var/lib/docker/containers/e6060a8f50ed0c2455e55ae466f101226d2668a28d8e19070bf4f6b2b3c6dd73/shm/run/user/[root@centos-04 tmp]# vim 17.sh
#!/bin/bashdir=/tmp/diskd=`date +%F`m=123@123.com[ -d $dir ] || mkdir $dirdf >> $dir/$d.logdf -i >> $dir/$d.logdf|sed '1d' |awk -F ' +|%' '$5>=85 {print $7}' > $dir/df.tmpdf -i|sed '1d' |awk -F ' +|%' '$5>=85 {print $7}' > $dir/df_i.tmpn1=`wc -l $dir/df.tmp|awk '{print $1}'`n2=`wc -l $dir/df_i.tmp|awk '{print $1}'`tag=0if [ $n1 -gt 0 ]then        if [ $n2 -gt 0 ]        then                tag=11        else                tag=10        fielse        if [ $n2 -gt 0 ]        then                tag=01        else                tag=00        fificase $tag in        11)        python mail.py $m  "磁盘空间和inode使用率高于85" "`cat $dir/df.tmp $dir/df_i.tmp|xargs`"        ;;        10)        python mail.py $m "磁盘空使用率高于85" "`cat $dir/df.tmp|xargs`"        ;;        01)        python mail.py $m "磁盘inode使用率高于85" "`cat $dir/df_i.tmp|xargs`"        ;;        *)        ;;esac

检测新文件 

需要任务计划执行

[root@centos-04 tmp]# vim 18.sh#!/bin/bashbasedir=/tmp/t=`date +%Y%m%d%H%M`find $basedir/ -type f -mmin -5 > /tmp/file.listn=`wc -l /tmp/file.list|awk '{print $1}'`if [ $n -gt 0 ]then        mv /tmp/file.list /tmp/$t.listfi
[root@centos-04 tmp]# sh 18.sh [root@centos-04 tmp]# ls10.sh  12.sh  14.sh  16.sh  18.sh  2018-12-26.log     2.sh  456.log  5.sh  7.sh  9.sh  mail.py   test.sql11.sh  13.sh  15.sh  17.sh  1.sh   201901050745.list  3.sh  4.sh     6.sh  8.sh  disk  pass.tmp  tmp.SzNhh17qiE

最常用的命令  

history命令调用的就是~/.bash_history文件的内容,统计最常用的10条命令

[root@centos-04 tmp]# cat ~/.bash_history |sort |uniq -c |sort -nr |head    238 ls     34 docker ps     25 cd ../     24 docker ps -a     18 docker exec -it c58be577ba9f bash     17 docker images     13 docker exec -it c00e5859f876 bash     10 ll     10 docker restart c00e5859f876      9 ps aux|grep nginx[root@centos-04 tmp]#

统计文件大小  

计划任务执行

 时间计算

[root@centos-04 tmp]# date -d "-16 hour" +%H08[root@centos-04 tmp]# date  +%H             00[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 20.sh #!/bin/bashdir=/tmp/log_statt=`date +%d%H`t1=`date +%H`logdir=/data/log[ -f $dir/$t.log ] && rm -f $dir/$t.log[ -d $dir ] || mkdir $dirif [ $t == "00" -o $t == "12" ]then        for f in `find $logdir/ -type f`        do                > $f        doneelse        for f in `find $logdir/ -type f`        do                du -sh $f >> $dir/$t.log        donefi

计算数字个数

-e的用法

[root@centos-04 tmp]# for i in `echo -e "123\nabc 123"`; do echo $i; done123abc123[root@centos-04 tmp]#
[root@centos-04 tmp]# wc -l 202018-12-26.log     201901050745.list  20.sh              [root@centos-04 tmp]# wc -l 2018-12-26.log 14 2018-12-26.log[root@centos-04 tmp]# for i in `seq 1 14`; do sed -n "$i"p 2018-12-26.log; done文件系统                 容量  已用  可用 已用% 挂载点/dev/mapper/centos-root   18G  6.2G   12G   36% /devtmpfs                 898M     0  898M    0% /devtmpfs                    910M     0  910M    0% /dev/shmtmpfs                    910M   30M  881M    4% /runtmpfs                    910M     0  910M    0% /sys/fs/cgroup/dev/sda1                497M  167M  331M   34% /boottmpfs                    182M     0  182M    0% /run/user/0overlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/ffa13b95ae63f2954be362511c25724d5b854201e405eb4913b54b80e9cf6617/mergedshm                       64M     0   64M    0% /var/lib/docker/containers/f42d989248587138ac2094003ae274467518b1a15d8ead51664cc03ea0c94e59/shmoverlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/53a9f09976bd64507e995cffd443f1e151fddd88c266afc416d0fb90cb90de14/mergedoverlay                   18G  6.2G   12G   36% /var/lib/docker/overlay2/35bdef03d5af944aa5b87ee4d0ca692a6d4b6394f94633f26ebc78e664ca3150/mergedshm                       64M     0   64M    0% /var/lib/docker/containers/e6060a8f50ed0c2455e55ae466f101226d2668a28d8e19070bf4f6b2b3c6dd73/shmshm                       64M     0   64M    0% /var/lib/docker/containers/c58be577ba9f3351c23c5d1d1ec9661f129aa109735d42046a9e9e465a787306/shm[root@centos-04 tmp]#
[root@centos-04 tmp]# while read line; do echo $line; done < 2018-12-26.log 文件系统 容量 已用 可用 已用% 挂载点/dev/mapper/centos-root 18G 6.2G 12G 36% /devtmpfs 898M 0 898M 0% /devtmpfs 910M 0 910M 0% /dev/shmtmpfs 910M 30M 881M 4% /runtmpfs 910M 0 910M 0% /sys/fs/cgroup/dev/sda1 497M 167M 331M 34% /boottmpfs 182M 0 182M 0% /run/user/0overlay 18G 6.2G 12G 36% /var/lib/docker/overlay2/ffa13b95ae63f2954be362511c25724d5b854201e405eb4913b54b80e9cf6617/mergedshm 64M 0 64M 0% /var/lib/docker/containers/f42d989248587138ac2094003ae274467518b1a15d8ead51664cc03ea0c94e59/shmoverlay 18G 6.2G 12G 36% /var/lib/docker/overlay2/53a9f09976bd64507e995cffd443f1e151fddd88c266afc416d0fb90cb90de14/mergedoverlay 18G 6.2G 12G 36% /var/lib/docker/overlay2/35bdef03d5af944aa5b87ee4d0ca692a6d4b6394f94633f26ebc78e664ca3150/mergedshm 64M 0 64M 0% /var/lib/docker/containers/e6060a8f50ed0c2455e55ae466f101226d2668a28d8e19070bf4f6b2b3c6dd73/shmshm 64M 0 64M 0% /var/lib/docker/containers/c58be577ba9f3351c23c5d1d1ec9661f129aa109735d42046a9e9e465a787306/shm[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 21.sh#!/bin/bashsum=0while read linedo        line_n=`echo $line|sed 's/[^0-9]//g'|wc -L`        echo $line_n        sum=$[$sum+$line_n]done < $1echo "sum:$sum"[root@centos-04 tmp]# sh 21.sh 2018-12-26.log088898129535247474850sum:359[root@centos-04 tmp]# head -1 2018-12-26.log 文件系统                 容量  已用  可用 已用% 挂载点[root@centos-04 tmp]# tail -1 2018-12-26.log     shm                       64M     0   64M    0% /var/lib/docker/containers/c58be577ba9f3351c23c5d1d1ec9661f129aa109735d42046a9e9e465a787306/shm[root@centos-04 tmp]#

对比文件差异

将文件做MD5

[root@centos-04 tmp]# md5sum 2018-12-26.log b11c7a1a9da1ab2b474ce5dea5e02fe1  2018-12-26.log[root@centos-04 tmp]#

EOF嵌入文档

第一步:传列表文件,第二步我们又写了一个脚本,第三步将脚本传到1.1.1.1机器

[root@centos-04 tmp]# cat > 2.txt << EOF> 1> 2> 3> EOF[root@centos-04 tmp]# cat 2.txt123[root@centos-04 tmp]#

  

#!/bin/bashdir=/data/web[ -f /tmp/md5.list ] && rm -f /tmp/md5.listfind $dir/ -type f > /tmp/file.listwhile read line do    md5sum $line  >> /tmp/md5.listdone < /tmp/file.listscp /tmp/md5.list B:/tmp/[ -f /tmp/check_md5.sh ] && rm -f /tmp/check_md5.shcat >/tmp/check_md5.sh << EOF#!/bin/bashdir=/data/webn=\`wc -l /tmp/md5.list|awk '{print \$1}'\`for i in \`seq 1 \$n\`do    file_name=\`sed -n "\$i"p /tmp/md5.list |awk '{print \$1}'\`    md5=\`sed -n "\$i"p /tmp/md5.list|awk '{print \$2}'\`    if [ -f \$file_name ]    then	md5_b=\`md5sum \$file_name\`	if [\$md5_b != \$md5 ]	then	    echo "\$file_name changed."	fi    else	echo "\$file_name lose."    fidoneEOFscp /tmp/check_md5.sh B:/tmp/ssh B "/bin/bash /tmp/check_md5.sh"

检测网卡流量

sar命令,我们这里看第五列和第六列(8bit=1byte,100Mbit=12.5MByte/s)

[sun.yujun@kddi-zol-php-test-web1 routes]$ sar -n DEV 1 5Linux 2.6.32-696.18.7.el6.x86_64 (kddi-zol-php-test-web1.zoldc.com.cn)  01/14/2019      _x86_64_        (12 CPU)07:19:09 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s07:19:10 PM        lo      5.00      5.00      0.50      0.50      0.00      0.00      0.0007:19:10 PM      eth0     13.00      6.00      0.77      0.42      0.00      0.00      0.0007:19:10 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s07:19:11 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.0007:19:11 PM      eth0     12.00      6.00      0.71      0.73      0.00      0.00      0.0007:19:11 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s07:19:12 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.0007:19:12 PM      eth0     12.00      5.00      0.72      0.68      0.00      0.00      0.0007:19:12 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s07:19:13 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.0007:19:13 PM      eth0     16.83      5.94      1.00      0.74      0.00      0.00      0.0007:19:13 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s07:19:14 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.0007:19:14 PM      eth0      8.00      3.00      0.48      0.56      0.00      0.00      0.00Average:        IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/sAverage:           lo      1.00      1.00      0.10      0.10      0.00      0.00      0.00Average:         eth0     12.38      5.19      0.74      0.62      0.00      0.00      0.00[sun.yujun@kddi-zol-php-test-web1 routes]$ ^C[sun.yujun@kddi-zol-php-test-web1 routes]$   

 将脚本放到crontab里面,一分钟执行一次

[root@centos-04 tmp]# vim 23.sh#!/bin/bashlogdir=/tmp/sar_logfile=$logdir/`date +%d$H`.logt=`date +"%F %H:%M"`[ -d $logdir ] || mkdir -p $logdirLANG=ensar -n DEV 1 5 |grep eth0 |grep "Average" > /tmp/sar.tmpexec >>$fileecho "$t"awk '{print "input:",$5*8000"bps""\n""output:",$6*8000"bps"}' /tmp/sar.tmpecho "###################"[root@centos-04 tmp]# sh 23.sh
[root@centos-04 tmp]# ls /tmp/sar_log/15.log[root@centos-04 tmp]# cat /tmp/sar_log/15.log 2019-01-15 03:48input: 160bpsoutput: 80bps###################[root@centos-04 tmp]#

批量杀进程

[root@centos-04 tmp]# vim 24.sh#!/bin/bashfor pid in `ps aux|grep clearnen.sh|awk '{print $2}'`; do         echo $pid;         kill -9 $pid;done

判断web服务

[root@centos-04 tmp]# netstat -lntp|grep ':80 '|awk -F '/' '{print $NF}'nginx: master  [root@centos-04 tmp]#
[root@centos-04 tmp]# lsof -i :80 |grep 'LISTEN'nginx   6958   root   11u  IPv4  38456      0t0  TCP *:http (LISTEN)nginx   6959 nobody   11u  IPv4  38456      0t0  TCP *:http (LISTEN)[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 25.sh#!/bin/bashn=`netstat -lntp |grep ':80 '|wc -l`if [ $n -eq 0 ]then        echo "It not listen port 80"else        ser=`netstat -lntp |grep ':80 '|awk -F '/' '{print $NF}'|sed 's/ //g'`        echo "It is listenning port 80,and the service is $ser."fi[root@centos-04 tmp]# sh 25.sh It is listenning port 80,and the service is nginx:master.[root@centos-04 tmp]#

监控mysql服务

[root@centos-04 tmp]# mysql -uroot -p123456 -h172.17.0.2 -e "show processlist"+----+------+------------------+------+---------+------+-------+------------------+| Id | User | Host             | db   | Command | Time | State | Info             |+----+------+------------------+------+---------+------+-------+------------------+|  3 | root | 172.17.0.1:50676 | NULL | Query   |    0 | init  | show processlist |+----+------+------------------+------+---------+------+-------+------------------+[root@centos-04 tmp]#     

判断是否是从数据库

[root@centos-04 tmp]# mysql -uroot -p123456 -h172.17.0.2 -e "show slave status\G"[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 26.sh #!/bin/bashmysql = "/usr/local/mysql/bin/mysql -uroot -p123456"if ! $mysql -e "show processlist" >/dev/null 2>/dev/nullthen        echo "MySql service is down."        exitelse        $mysql -e "show slave status\G" 2>/dev/null >/tmp/slave.stat        n=`wc -l /tmp/slave.stat|awk '{print $1}'`        if [ $n -eq 0 ]        then                echo "This is master."        else                echo "This is slave."                egrep 'Slave_10_Runing:|Slave_SQL_Running:'/tmp/slave/.stat|awk -F ': ' '{print $2}' > /tmp/SQL.tmp                if grep -qw "No" /tmp/SQL.tmp                then                        echo "The slave is down."                fi        fifi

增删用户

[root@centos-04 tmp]# vim 27.sh #!/bin/bashif [ $# -eq 0 ] || [ $# -gt 2 ]then    echo "Wrong, use bash $0 --add username, or bash $0 --del username or bash $0 --help"    exitfiex_user(){    if ! id $1 2>/dev/null >/dev/null    then        useradd $1 && echo "$1 add successful."    else        echo $1 exist.    fi}notex_user(){    if id $1 2>/dev/null >/dev/null    then        userdel $1 && echo "$1 delete successful."    else        echo $1 not exist.    fi}case $1 in    --add)        if [ $# -eq 1 ]        then            echo "Wrong, use bash $0 --add user or bash $0 --add user1,user2,user3..."            exit        else            n=`echo $2| awk -F ',' '{print NF}'`            if [ $n -gt 1 ]            then                for i in `seq 1 $n`                do                    username=`echo $2 |awk -v j=$i -F ',' '{print $j}'`                    ex_user $username                done            else                ex_user $2            fi        fi        ;;    --del)        if  [ $# -eq 1 ]        then            echo "Wrong, use bash $0 --del user or bash $0 --del user1,user2,user3..."            exit        else            n=`echo $2| awk -F ',' '{print NF}'`            if [ $n -gt 1 ]            then                for i in `seq 1 $n`                do                    username=`echo $2 |awk -v j=$i -F ',' '{print $j}'`                    notex_user $username                done            else                notex_user $2            fi        fi        ;;    --help)        if  [ $# -ne 1 ]        then            echo "Wrong, use bash $0 --help"            exit        else        echo "Use bash $0 --add username or bash $0 --add user1,user2,user3... add user."        echo "    bash $0 --del username -r bash $0 --del user1,user2,user3... delete user."        echo "    bash $0 --help print this info."        fi    ;;    *)        echo "Wrong, use bash $0 --add username, or bash $0 --del username or bash $0 --help"    ;;esac

 计算和

#!/bin/bashsum=0for i in `seq 1 100`do        j=$[$i%3]        if [ $j -eq 0 ]        then                sum=$[$sum+$i]        fidoneecho $sum

加减乘除

[root@centos-04 tmp]# vim 29.sh#!/bin/bashis_nu(){    n=`echo $1 |sed 's/[0-9]//g'`    if [ -n "$n" ]    then        echo "给出的参数必须是正整数"        exit    fi}if [ $# -ne 2 ]then    echo "必须要输入两个参数"    exitelse    is_nu $1    is_nu $2fibig(){    if [ $1 -gt $2 ]    then        echo $1    else        echo $2    fi}small(){    if [ $1 -lt $2 ]    then        echo $1    else        echo $2    fi}add(){    sum=$[$1+$2]    echo "$1+$2=$sum"}jian(){   b=`big $1 $2`   s=`small $1 $2`   cha=$[$b-$s]   echo "$b-$s=$cha"}cheng(){    ji=$[$1*$2]    echo "$1x$2=$ji"}chu(){   b=`big $1 $2`   s=`small $1 $2`   v=`echo "scale=2;$b/$s"|bc`   echo "$b/$s=$v"}add $1 $2jian $1 $2cheng $1 $2chu $1 $2

输入数字

[root@centos-04 tmp]# vim 30.sh#!/bin/bashwhile :do        read -p "请输入一个数字:" n        if [ -z "$n" ]        then                echo "请输入一个纯数字。"                continue        fi        if echo $n |grep -qi 'end'        then                exit        fi        n1=`echo $n|sed 's/[0-9]//g'`        if [ -n "$n1" ]        then                echo "请输入一个纯数字"                continue        else                echo "你输入的数字是:$n"                continue        fidone

获取网卡ip

 

[root@centos-04 tmp]# ip add |awk -F ': ' '$1 ~ "^[1-9]" {print $2}'loens33docker0vethd17e886@if4[root@centos-04 tmp]#
[root@centos-04 tmp]# ip add show dev ens33 |grep ' inet '|awk '{print $2}'192.168.242.130/24[root@centos-04 tmp]#
[root@centos-04 tmp]# ip add show dev ens33 |grep ' inet '|awk '{print $2}'|awk -F '/' '{print $1}'192.168.242.130[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 31.sh#!/bin/baship add |awk -F ': ' '$1 ~ "^[1-9]" {print $2}' > /tmp/eth.listwhile :do    eths=`cat /tmp/eth.list |xargs`    read -p "Please input a if name(The eths is `echo -e "\033[31m$eths\033[0m"`): " eth    if [ -z "$eth" ]    then        echo "Please input a if name."        continue    fi    if ! grep -qw "$eth" /tmp/eth.list    then        echo "The if name is error."        continue    else        break    fidoneif_ip() {    ip add show dev $1 |grep ' inet ' |awk '{print $2}'|awk -F '/' '{print $1}' >/tmp/$1.txt    n=`wc -l /tmp/$1.txt|awk '{print $1}'`    if [ $n -eq 0 ]    then        echo "There is no ip address on the eth."    else        echo "The ip addreess is:"        for ip in `cat /tmp/$1.txt`        do            echo -e "\033[33m$ip\033[0m"        done    fi}if_ip $eth

列出目录内容

 $@指的是1.sh 后面的一堆参数1 2 3 4 a b,$#表示所有参数的个数

[root@centos-04 tmp]# sh 1.sh 1 2 3 4 a b
[root@centos-04 tmp]# vim 32.sh                 #!/bin/bashif [ $# -eq 0 ]then        ls -l .else        for d in $@        do                echo "There are these directorys in $d:"                find $d -type d        donefi[root@centos-04 tmp]# sh 32.sh /tmp/ /usr/local/There are these directorys in /tmp/:/tmp//tmp/.XIM-unix/tmp/.font-unix/tmp/.X11-unix/tmp/.ICE-unix/tmp/.Test-unixThere are these directorys in /usr/local/:/usr/local//usr/local/bin/usr/local/etc/usr/local/games
[root@centos-04 tmp]# sh 32.sh总用量 32-rw-r--r-- 1 root root 1771 1月  19 00:06 27.sh-rw-r--r-- 1 root root  122 1月  19 00:28 28.sh-rw-r--r-- 1 root root  742 1月  19 00:58 29.sh-rw-r--r-- 1 root root  343 1月  19 01:06 30.sh-rw-r--r-- 1 root root  765 1月  19 02:39 31.sh-rw-r--r-- 1 root root  134 1月  28 22:34 32.sh-rw-r--r-- 1 root root   33 1月  19 02:32 eth.list-rw-r--r-- 1 root root   10 1月  19 02:32 lo.txt[root@centos-04 tmp]#
(优化版) #!/bin/bashif [ $# -eq 0 ]then        echo "当前目录下的文件是:"        ls -l .else        for d in $@        do                if [ -d $d ]                then                        echo "There are these directorys in $d:"                        find $d -type d                else                        echo "并没有该目录:$d"                fi        donefi

下载文件  

[root@centos-04 tmp]# vim 33.sh#!/bin/bashif [ $# -ne 2 ]then        echo "你必须要输入两个参数,第一个参数是网址,第二个参数是目录。"        exit 1fiif [ ! -d $2 ]then        while :        do        echo "你输入的第二个参数并不是一个存在的目录,是否要创建该目录呢?(y|n):"c        case $c in                y|Y)                        mkdir -p $2                        ;;                n|N)                        exit 51                        ;;                *)                        echo "请输入y或n"                        continue                        ;;        esac        doneelse        cd $2        wget $1        if [ $? -eq 0 ]        then                exit 0        else                echo "下载失败"                exit 52        fifi

猜数字

1.返回随机数

[root@centos-04 tmp]# echo $RANDOM15845[root@centos-04 tmp]#
[root@centos-04 tmp]# echo $[$RANDOM%101] (取0-100的数)77[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 34.sh #!/bin/bashn=$[$RANDOM%101]while :do        read -p "请输入一个0-100的数字:" n1

      if [ -z "$n1" ]

        then
        echo "必须输入一个数字"
        continue
      fi

n2=`echo $n1 |sed 's/[0-9]//g'`        if [ -n "$n2" ]        then                echo "你输入的数字并不是正整数。"                continue        else                if [ $n -gt $n1 ]                then                        echo "你输入的数字小了"                        continue                elif [ $n -lt $n1 ]                then                        echo "你输入的数字大了"                        continue                else                        echo "恭喜你"                        break                fi        fidone[root@centos-04 tmp]# sh 34.sh 请输入一个0-100的数字:10你输入的数字小了请输入一个0-100的数字:20你输入的数字小了请输入一个0-100的数字:50你输入的数字小了请输入一个0-100的数字:90你输入的数字大了请输入一个0-100的数字:60你输入的数字小了请输入一个0-100的数字:70你输入的数字小了请输入一个0-100的数字:80你输入的数字小了请输入一个0-100的数字:85你输入的数字大了请输入一个0-100的数字:83你输入的数字小了请输入一个0-100的数字:84恭喜你[root@centos-04 tmp]#

根据名字得数字  

[root@centos-04 tmp]# vim 35.sh#!/bin/bashf=/tmp/user_number.txtwhile :do        read -p "Please input a username:" u        u1=`echo $u|sed 's/[a-zA-Z0-9]//g'`        if [ -n "$u1" ]        then                echo "你输入的用户名不符合规范,正确的用户名应该是大小写字母和数字的组合"                continue        else                if [ -f $f ]                then                        u_n=`awk -v uu=$u '$1==uu {print $2}' $f`                        if [ -n "$u_n" ]                        then                                echo "用户$u对应的数字是:$u_n"                        else                                n=$[$RANDOM%100]                                echo "用户$u对应的数字是:$n"                                echo $u $n >> $f                        fi                else                        n=$[$RANDOM%100]                        echo "用户$u对应的数字是:$n"                        echo $u $n >> $f                fi        fidone[root@centos-04 tmp]# sh 35.sh Please input a username:user1用户user1对应的数字是:66Please input a username:user2用户user2对应的数字是:45Please input a username:

根据名字得数字优化

[root@centos-04 tmp]# vim 35.sh#!/bin/bashf=/tmp/user_number.txtjude_n(){#!/bin/bashf=/tmp/user_number.txtj_n(){        while :        do                n=$[RANDOM%100]                if awk '{print $2}' $f|grep -qw $n                then                        continue                else                        break                                n=$[$RANDOM%100]                        n=$[$RANDOM%100]                        if awk '{print $2} $f|grep -qw $n'                fi        done}while :do        read -p "Please input a username:" u        if [ -z "$u" ]        then                echo "请输入用户名"                continue        fi        if [ $u == "q" ] || [ $u=="Q" ]        then                exit        fi        u1=`echo $u|sed 's/[a-zA-Z0-9]//g'`        if [ -n "$u1" ]        then                echo "你输入的用户名不符合规范,正确的用户名应该是大小写字母和数字的组合"                continue        else                if [ -f $f ]                then                        u_n=`awk -v uu=$u '$1==uu {print $2}' $f`                        if [ -n "$u_n" ]                        then                                echo "用户$u对应的数字是:$u_n"                        else                                j_n                                echo "用户$u对应的数字是:$n"                                echo $u $n >> $f                        fi                else                        j_n                        echo "用户$u对应的数字是:$n"                        echo $u $n >> $f                fi        fidone

一个数字的行

[root@centos-04 tmp]# echo "aaaaa1bbbbb" |sed "s/[^0-9]//g"1[root@centos-04 tmp]# echo "aaaaa1bbbbb" |sed "s/[^0-9]//g" |wc -L1[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 1.txt 222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333222222222222fasf333[root@centos-04 tmp]# vim 36.sh #!/bin/bashwhile read linedo        n=`echo $line |sed 's/[^0-9]//g'|wc -L`        if [ $n -eq 1 ]        then                echo $line        fidone < 1.txt

日志切割归档  

想要实现的效果,当有日志文件1.log.5时把1.log.5文件删除,将1.log.4文件移到为1.log.5,以此类推。

#!/bin/bashcd /data/logs#rm 1.log.5#mv 1.log.4 1.log.5#mv 1.log.3 1.log.4#mv 1.log.2 1.log.3#mv 1.log.1 1.log.2#mv 1.log   1.log.1
[root@centos-04 tmp]# vim 37.sh#!/bin/bashcd /data/logslog=1.logmv_log(){        [ -f $1 ] && mv $1 $2}[ -f $log.5 ] && rm -f $log.5for i in `seq 4 -1 1`do        j=$[$i+1]        mv_log $log.$i $log.$jdonemv 1.log 1.log.1#rm 1.log.5#mv 1.log.4 1.log.5#mv 1.log.3 1.log.4#mv 1.log.2 1.log.3#mv 1.log.1 1.log.2#mv 1.log   1.log.1
[root@centos-04 tmp]# cd  /data/logs/  [root@centos-04 logs]# touch 1.log[root@centos-04 logs]# echo "111" > 1.log[root@centos-04 logs]# cat 1.log 111[root@centos-04 logs]# cd /tmp/[root@centos-04 tmp]# sh 37.sh [root@centos-04 tmp]# cd /data/logs/[root@centos-04 logs]# ls1.log.1[root@centos-04 logs]# cat 1.log.1 111[root@centos-04 logs]# touch 1.log[root@centos-04 logs]# echo '000' > 1.log[root@centos-04 logs]# cd /tmp/[root@centos-04 tmp]# sh 37.sh [root@centos-04 tmp]# cd /data/logs/[root@centos-04 logs]# ls1.log.11.log.2[root@centos-04 logs]# cat 1.log.1000[root@centos-04 logs]# cat 1.log.2111[root@centos-04 logs]#

查找在线IP  

[root@centos-04 tmp]# vim 38.sh#!/bin/bashfor i in `seq 1 254`do        if ping -c 2 -W 2 10.19.37.$i > /dev/null 2>/dev/null        then                echo "10.19.37.$i 是通的。"        else                echo "10.19.37.$i 不通。"        fidone

检查脚本错误

1.-n 检查脚本错误

2.演示语法错误,我们故意给for前加一个i

[root@centos-04 tmp]# vim 38.sh #!/bin/bashifor i in `seq 1 254`do        if ping -c 2 -W 2 10.19.37.$i > /dev/null 2>/dev/null        then                echo "10.19.37.$i 是通的。"        else                echo "10.19.37.$i 不通。"        fidone
[root@centos-04 tmp]# sh -n 38.sh38.sh:行3: 未预期的符号 `do' 附近有语法错误38.sh:行3: `do'[root@centos-04 tmp]# [root@centos-04 tmp]# sh -n 38.sh > /tmp/1.txt 2> /tmp/2.txt[root@centos-04 tmp]# echo $?2[root@centos-04 tmp]# [root@centos-04 tmp]# cat /tmp/2.txt 38.sh:行3: 未预期的符号 `do' 附近有语法错误38.sh:行3: `do'[root@centos-04 tmp]#
[root@centos-04 tmp]# sh 39.sh 1.shsh: 1.sh: 没有那个文件或目录请输入q|Q退出脚本。q[root@centos-04 tmp]# ls1.txt  31.sh  33.sh  35.sh  37.sh  39.sh    proxy.log  user_number.txt2.txt  32.sh  34.sh  36.sh  38.sh  456.log  sh.err[root@centos-04 tmp]# sh 39.sh 31.sh 脚本31.sh没有语法错误。[root@centos-04 tmp]# sh 39.sh 38.sh 38.sh:行3: 未预期的符号 `do' 附近有语法错误38.sh:行3: `do'请输入q|Q退出脚本。#!/bin/bashifor i in `seq 1 254`do        if ping -c 2 -W 2 10.19.37.$i > /dev/null 2>/dev/null        then                echo "10.19.37.$i 是通的。"        else                echo "10.19.37.$i 不通。"        fidone                                                                                                      "38.sh" 10L, 178C 已写入[root@centos-04 tmp]#

格式化数字  

给每个数字前面添加空格s代表替换,点当前数字&点号代表的数字。

[root@centos-04 tmp]# echo "1234"|sed 's/./& /g'1 2 3 4 [root@centos-04 tmp]#
[root@centos-04 tmp]# vim 40.sh #!/bin/bashn=`echo $1|wc -L`for d in `echo $1|sed 's/./& /g'`do        n2=$[$n%3]        if [ $n2 -eq 0 ]        then                echo -n ",$d"        else                echo -n "$d"        fi        n=$[$n-1]done |sed 's/^,//'echo
[root@centos-04 tmp]# sh 40.sh 1234512,345[root@centos-04 tmp]# sh 40.sh 123123[root@centos-04 tmp]# sh 40.sh 12355551,235,555

问候脚本  

获取10小时之前的时间

[root@centos-04 tmp]# d=`date -d "-10 hours" +%H`[root@centos-04 tmp]# echo $d17
[root@centos-04 tmp]# vim 41.sh                  #!/bin/bashd=`date +%H`if [ $d -ge 0 -a $d -lt 7 ]then        tag=1elif [ $d -ge 7 -a $d -lt 12 ]then        tag=2elif [ $d -ge 12 -a $d -lt 18 ]then        tag=3else        tag=4ficase $tag in        1)                echo "早上好"                ;;        2)                echo "上午好"                ;;        3)                echo "下午好"                ;;        4)                echo "晚上好"                ;;        *)                echo "脚本出错了"                ;;  esac    ~                                                                                                         ~                                                                                                         "41.sh" 32L, 333C 已写入                                                                [root@centos-04 tmp]# [root@centos-04 tmp]# sh 41.sh 早上好[root@centos-04 tmp]#

 菜单脚本

[root@centos-04 tmp]# vim 42.sh#!/bin/bashPS3="Please input your choice:" 为了去掉结果中的#?select i in w ls pwd quitdo        case $i in                w)                        w                        ;;                ls)                        ls                        ;;                pwd)                        pwd                        ;;                quit)                        exit                        ;;                *)                        echo "please input 1-3."                        ;;        esacdone                                                                                                       "42.sh" [新] 21L, 179C 已写入                                                           [root@centos-04 tmp]# sh 440.sh    41.sh    42.sh    456.log  [root@centos-04 tmp]# sh 42.sh 1) w2) ls3) pwd4) quit#? 1 03:48:09 up 4 days,  8:11,  1 user,  load average: 0.00, 0.01, 0.05USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHATroot     pts/0    192.168.242.1    21:44    1.00s  0.26s  0.01s w#? 21.txt  31.sh  33.sh  35.sh  37.sh  39.sh  41.sh  456.log    sh.err2.txt  32.sh  34.sh  36.sh  38.sh  40.sh  42.sh  proxy.log  user_number.txt#? 3/tmp#? 4[root@centos-04 tmp]#
[root@centos-04 tmp]# echo -e "1) w\n2) ls\n3) pwd\n4)"1) w2) ls3) pwd4)[root@centos-04 tmp]# [root@centos-04 tmp]# vim 42-2.sh                      #!/bin/bashecho -e "1) w\n2) ls\n3) pwd\n4) quit"while :doread -p "Please input your choice(1-4):" ccase $c in        1)                w                ;;        2)                ls                ;;        3)                pwd                ;;        4)                exit                ;;        *)                echo "Please input 1-4"                ;;esacdone                                                                                   "42-2.sh" 23L, 219C 已写入                                                              [root@centos-04 tmp]# sh 42-2.sh 1) w2) ls3) pwd4) quitPlease input your choice(1-4):1 04:42:46 up 4 days,  9:06,  1 user,  load average: 0.00, 0.01, 0.05USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHATroot     pts/0    192.168.242.1    21:44    6.00s  0.27s  0.00s wPlease input your choice(1-4):21.txt  31.sh  33.sh  35.sh  37.sh  39.sh  41.sh    42.sh    proxy.log  user_number.txt2.txt  32.sh  34.sh  36.sh  38.sh  40.sh  42-2.sh  456.log  sh.errPlease input your choice(1-4):Please input 1-4Please input your choice(1-4):3/tmpPlease input your choice(1-4):4[root@centos-04 tmp]#

检查用户是否登录  

思路:通过w命令获取第一列的用户

[root@centos-04 tmp]# vim 43.sh#!/bin/bashwhile :do        if w|sed '1'd|awk '{print $1}'|grep -qw "$1"        then                echo "用户$1已经登录系统"                exit        fi        sleep 300done                                                                                                       [root@centos-04 tmp]# sh 43.sh root用户root已经登录系统[root@centos-04 tmp]#

检查系统是否入侵

$0	当前脚本的文件名$n	传递给脚本或函数的参数。n 是一个数字,表示第几个参数。例如,第一个参数是$1,第二个参数是$2。$#	传递给脚本或函数的参数个数。$*	传递给脚本或函数的所有参数。$@	传递给脚本或函数的所有参数。被双引号(" ")包含时,与 $* 稍有不同,下面将会讲到。$?	上个命令的退出状态,或函数的返回值。$$	当前Shell进程ID。对于 Shell 脚本,就是这些脚本所在的进程ID。

有时候,你会想手动跟踪命令的输出内容,同时又想将输出的内容写入文件

tee 命令基于标准输入读取数据,标准输出或文件写入数据

[root@centos-04 tmp]# vim 44.sh #!/bin/bashpp=$$ps -elf |sed '1'd > /tmp/pid.txtfor pid in `awk -v ppn=$pp '$5!=ppn {print $4}' /tmp/pid.txt`do        if ! [ -d /proc/$pid ]        then                echo "系统中并没有pid为$pid的目录,需要检查。"        fidone[root@centos-04 tmp]# sh 44.sh

 三行并一行

[root@centos-04 tmp]# vim 45.sh      #!/bin/bashn=1cat $1 |while read linedo        n1=$[$n%3]        if [ $n1 -eq 0 ]        then                echo "$line"        else                echo -n "$line"        fi        n=$[$n+1]done[root@centos-04 tmp]# sh 45.sh 1.txt 12345678 3333[root@centos-04 tmp]#

网卡和ip

~就是表示用来匹配后面的正则表达式,告诉awk后面开始是正则语法。

NF 表示的是浏览记录的元素的个数 

$NF 表示的最后一个Field(列),即输出最后一个字段的内容

[root@localhost SHELL]# free -m | grep buffers\/-/+ buffers/cache:       1815       1859[root@localhost SHELL]# free -m | grep buffers\/ | awk '{print $NF}'1859[root@localhost SHELL]# free -m | grep buffers\/ | awk '{print NF}'4[root@localhost SHELL]#

  

[root@centos-04 tmp]# ip add |awk -F ': ' '$1 ~ "^[1-9]" {print $2}'loens33[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 46.sh #!/bin/baship add |awk -F ': ' '$1 ~ "^[1-9]" {print $2}' > /tmp/ifs.txtget_ip(){    ip add show dev $1 |grep inet |awk '{print $2}' |awk -F '/' '{print $1}'}for eth in `cat /tmp/ifs.txt`do    myip=`get_ip $eth`    if [ -z "$myip" ]    then        echo $eth     else        echo $eth $myip     fidone > /tmp/if_ip.txtif [ $# -ne 2 ]then    echo "请输入正确的格式: bash $0 -i 网卡 或者 bash $0 -I ip"    exitfiif [ $1 == "-i" ]then    if awk '{print $1}' /tmp/if_ip.txt |grep -qw $2    then        eth=$2        ip1=`awk -v aeth=$eth '$1==aeth' /tmp/if_ip.txt|sed "s/$eth //"`        echo "网卡$2的ip是 $ip1"    else        echo "你指定的网卡不对,系统中的网卡有:`cat /tmp/ifs.txt|xargs`"        exit    fielif [ $1 == "-I" ]then    if grep -qw " $2 "  /tmp/if_ip.txt    then        eth=`grep -w " $2 " /tmp/if_ip.txt|awk '{print $1}'`        echo "IP $2对应的网卡是$eth"    else        echo "你指定的ip不对,系统中的IP有:`ip add |grep inet |awk '{print $2}'|awk -F '/' '{print $1}'|xargs`"        exit    fielse    echo "请输入正确的格式: bash $0 -i 网卡 或者 bash $0 -I ip"fi
[root@centos-04 tmp]# sh 46.sh 请输入正确的格式: bash 46.sh -i 网卡 或者 bash 46.sh -I ip[root@centos-04 tmp]# sh 46.sh -i eth33你指定的网卡不对,系统中的网卡有:lo ens33[root@centos-04 tmp]# sh 46.sh -i ens33网卡ens33的ip是 192.168.242.130 fe80::6244:d336:eacf:c4d6[root@centos-04 tmp]# sh 46.sh -i lo网卡lo的ip是 127.0.0.1 ::1[root@centos-04 tmp]# sh 46.sh -I 192.168.242.130你指定的ip不对,系统中的IP有:127.0.0.1 ::1 192.168.242.130 fe80::6244:d336:eacf:c4d6[root@centos-04 tmp]#

随机3位数

[root@centos-04 tmp]# echo $RANDOM26768[root@centos-04 tmp]# echo $[$RANDOM%10]6[root@centos-04 tmp]# echo $[$RANDOM%10]8[root@centos-04 tmp]# for i in `seq 0 2`; do a[$i]=$[$RANDOM%10]; done; echo ${a[@]}|sed s'/ //g'203[root@centos-04 tmp]#

把数组按字符串输出

echo ${a[@]}
[root@centos-04 tmp]#vim 47.sh#!/bin/bashget_number(){        for i in `seq 0 2`        do                a[$i]=$[$RANDOM%10]        done        echo ${a[@]}|sed s'/ //g'}if [ $# -eq 0 ]then        get_numberelif [ $# -eq 1 ]then        n=`echo $1|sed 's/[0-9]//g'`        if [ -n "$n" ]        then                echo "给定的参数必须是一个数字"                exit        fi        for i in `seq 1 $1`        do                get_number        done |xargselse        echo "格式不对,正确的格式是sh $0 [n],这里的n是一个数字。"fi~                                                                                                                               ~                                                                                                                               ~                                                                                                                               ~                                                                                                                               ~                                                                                                                               "47.sh" 28L, 414C 已写入                                                                                      [root@centos-04 tmp]# sh 47.sh 845[root@centos-04 tmp]# sh 47.sh 10898 422 695 369 417 402 573 800 957 614[root@centos-04 tmp]#

是否安装包

查看是否安装了包,未安装的包echo $? 会输出1,安装的包输出0

[root@centos-04 tmp]# rpm -q httpdhttpd-2.4.6-88.el7.centos.x86_64[root@centos-04 tmp]# yum list|grep httpdRepodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fasthttpd.x86_64                             2.4.6-88.el7.centos             @base
[root@centos-04 tmp]# rpm -q mysql未安装软件包 mysql [root@centos-04 tmp]# echo $?1[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 48.sh#!/bin/bashif_install(){        rpm -q $1 >/dev/null 2>/dev/null        if [ $? -eq 0 ]        then                echo "$1已经安装"                return 0        else                echo "$1没有安装"                return 1        fi}if_install httpdif [ $? -eq 0 ]then        if ! pgrep httpd >/dev/null        then                service httpd start        fielse        yum install -y httpdfiif_install mysql-serverif [ $? -eq 0 ]then        if ! pgrep mysqld >/dev/null        then                service mysqld start        fielse        yum install -y mysql-serverfi
[root@centos-04 tmp]# sh 48.shhttpd已经安装Redirecting to /bin/systemctl start httpd.serviceJob for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.mysql-server没有安装yum install -y mysql-server[root@centos-04 tmp]#

日期是否合法  

查看日期是否在指定的月中

[root@centos-04 tmp]# cal 02 2010      二月 2010     日 一 二 三 四 五 六    1  2  3  4  5  6 7  8  9 10 11 12 1314 15 16 17 18 19 2021 22 23 24 25 26 2728[root@centos-04 tmp]#
[root@centos-04 tmp]# cal 02 2010      二月 2010     日 一 二 三 四 五 六    1  2  3  4  5  6 7  8  9 10 11 12 1314 15 16 17 18 19 2021 22 23 24 25 26 2728[root@centos-04 tmp]# cal 02 2010|grep -w 2828[root@centos-04 tmp]# cal 02 2010|grep -w 30[root@centos-04 tmp]#
[root@centos-04 php_client]# y=2012; m=02; d=30[root@centos-04 php_client]# cal $m $y      二月 2012     日 一 二 三 四 五 六          1  2  3  4 5  6  7  8  9 10 1112 13 14 15 16 17 1819 20 21 22 23 24 2526 27 28 29[root@centos-04 php_client]# cal $m $y|grep -w $d (grep发现没有东西,那说明我们的日期不合法)[root@centos-04 php_client]#
[root@centos-04 /]# a=20180418[root@centos-04 /]# echo ${a:0:4}(取变量的前四个字符)2018[root@centos-04 /]#
${#1} (获取参数的长度,$1的长度)
[root@centos-04 /]# echo '2018'|grep -q "^0" [root@centos-04 /]# echo $?1[root@centos-04 /]# echo '0018'|grep -q "^0"  [root@centos-04 /]# echo $?0[root@centos-04 /]#
[root@centos-04 /]# vim 49.sh #!/bin/bashif [ $# -ne 1 ] || [ ${#1} -ne 8 ]then        echo 'please input sh $0 yyyymmdd'        exit 1fiy=`echo ${1:0:4}`m=`echo ${1:4:2}`d=`echo ${1:6:2}`if echo $d|grep -q "^0"then        d=`echo ${1:6:2}|sed 's/^0//'`fiif cal $m $y > /dev/null 2>/dev/nullthen        if ! cal $m $y |grep -qw "$d"        then                echo "你给的日期是不合法的"        else                echo "日期合法"        fielse        echo "你给的日期不合法"fi[root@centos-04 /]# sh 49.sh 20190101日期合法[root@centos-04 /]# sh 49.sh 20190131日期合法[root@centos-04 /]# sh 49.sh 20190132你给的日期是不合法的[root@centos-04 /]#

监控流量 

检查网卡流量

[root@centos-04 /]# sar -n DEV 1 5 |grep ens33  01时42分32秒     ens33      1.01      0.00      0.06      0.00      0.00      0.00      0.0001时42分33秒     ens33      1.01      1.01      0.06      0.22      0.00      0.00      0.0001时42分34秒     ens33      0.99      0.99      0.06      0.21      0.00      0.00      0.0001时42分35秒     ens33      1.01      1.01      0.06      0.22      0.00      0.00      0.0001时42分36秒     ens33      1.00      1.00      0.06      0.21      0.00      0.00      0.00平均时间:     ens33      1.00      0.80      0.06      0.17      0.00      0.00      0.00[root@centos-04 /]#
▽root@centos-04 /]# vim 50.sh     #!/bin/bashLANG=ensar -n DEV 1 10|grep -w "$1" > /tmp/sar.tmpin=`grep "Average:" /tmp/sar.tmp|awk '{print $5}'|sed 's/\.//'`out=`grep "Average:" /tmp/sar.tmp|awk '{print $6}'|sed 's/\.//'`if [ $in == "000" ] && [ $out == '000']then        ifdown $1        ifup $1fi[root@centos-04 /]# sh 50.sh ens33

判断网站是否正常  

[root@centos-04 /]# curl -I www.baidu.com 2>/dev/null |head -1 (加上将错误输出到null里,不加会输出下面的红色部分)HTTP/1.1 200 OK[root@centos-04 /]# curl -I www.baidu.com |head -1              % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                 Dload  Upload   Total   Spent    Left  Speed  0   277    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0HTTP/1.1 200 OK[root@centos-04 /]#
[root@centos-04 /]# curl -I www.baidu.com 2>/dev/null |head -1|awk '{print $2}'200[root@centos-04 /]#
[root@centos-04 tmp]# vim 50.sh   #!/bin/bash#这个脚本用来判断一个网址是否正常url='http://www.baidu.com'mail_user=sun.yujun@zol.com.cncode=`curl -I $url 2>/tmp/curl.err|head -1|awk '{print $2}'`if [ -z $code ]then        python mail.py $mail_user "$url访问异常" "`cat /tmp/curl.err`"        exitelif [ $code != "200" ]then        curl -I $url &>/tmp/curl.log        python mail.py $mail_user "$url访问异常 状态码$code" "`/tmp/curl.log`"fi[root@centos-04 tmp]# sh -x 50.sh + url=http://www.baidu.com+ mail_user=sun.yujun@zol.com.cn++ curl -I http://www.baidu.com++ head -1++ awk '{print $2}'+ code=200+ '[' -z 200 ']'+ '[' 200 '!=' 200 ']'[root@centos-04 tmp]#   

这里发邮件需要把mail.py文件放上  

小于5k文件打包

$HOME变量可以代替用户的家目录,当前登录的是哪个用户变量就指向这个用户的家目录。

[root@centos-04 tmp]# date +%F2019-03-10[root@centos-04 tmp]#
[root@centos-04 tmp]# tar zcvf 2018-02-02.tar.gz 1.txt 2.txt^C[root@centos-04 tmp]# find $HOME/ -type f -size -5k |xargs (xargs命令可以将打印结果放到一行)
root@centos-04 tmp]# vim 52.sh#!/bin/basht=`date +%F`cd $HOMEtar czf $t.tar.gz `find ./ -type f -size -5k|xargs`[root@centos-04 tmp]# sh -x 52.sh ++ date +%F+ t=2019-03-10+ cd /root++ find ./ -type f -size -5k++ xargs+ tar czf 2019-03-10.tar.gz ./.bash_logout ./.bash_profile[root@centos-04 home]# cd ~[root@centos-04 ~]# ls2019-03-10.tar.gz  clouddemo.py [root@centos-04 ~]# tar -tf 2019-03-10.tar.gz (-tf查看压缩包里的文件列表)

监控22端口是否被封  

 

[root@centos-04 ~]# iptables -nvL INPUTChain INPUT (policy ACCEPT 123K packets, 40M bytes) pkts bytes target     prot opt in     out     source               destination         [root@centos-04 ~]# iptables -I INPUT -p tcp --dport 22 -s 1.1.1.1 -j DROP[root@centos-04 ~]# iptables -I INPUT -p tcp --dport 22 -s 1.1.1.2 -j REJECT [root@centos-04 ~]# iptables -nvL INPUTChain INPUT (policy ACCEPT 9 packets, 568 bytes) pkts bytes target     prot opt in     out     source               destination             0     0 REJECT     tcp  --  *      *       1.1.1.2              0.0.0.0/0            tcp dpt:22 reject-with icmp-port-unreachable    0     0 DROP       tcp  --  *      *       1.1.1.1              0.0.0.0/0            tcp dpt:22[root@centos-04 ~]#
[root@centos-04 tmp]# iptables -nvL INPUT |grep -w 'dpt:22' (或者' dpt:22 ')    0     0 REJECT     tcp  --  *      *       1.1.1.2              0.0.0.0/0            tcp dpt:22 reject-with icmp-port-unreachable    0     0 DROP       tcp  --  *      *       1.1.1.1              0.0.0.0/0            tcp dpt:22[root@centos-04 tmp]#
[root@centos-04 tmp]# iptables -nvL INPUT |grep -w 'dpt:22' |awk '$3 ~/REJECT|DROP/' (正则匹配第三段的REJECT|DROP)    0     0 REJECT     tcp  --  *      *       1.1.1.2              0.0.0.0/0            tcp dpt:22 reject-with icmp-port-unreachable    0     0 DROP       tcp  --  *      *       1.1.1.1              0.0.0.0/0            tcp dpt:22[root@centos-04 tmp]#
[root@centos-04 tmp]# iptables -nvL INPUT --line-numbers |grep -w 'dpt:22' |awk '$4 ~/REJECT|DROP/ {print $1}' 12[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 53.sh   #!/bin/bashiptables -nvL INPUT --line-numbers |grep -w 'dpt:22' |awk '$4 ~/REJECT|DROP/ {print $1}' > /tmp/iptables.logn=`cat /tmp/iptables.log |wc -l`if [ $n -gt 0 ]then        for n in `tac /tmp/iptables.log`        do                iptables -D INPUT $n        donefi[root@centos-04 tmp]# sh -x 53.sh + iptables -nvL INPUT --line-numbers+ grep -w dpt:22+ awk '$4 ~/REJECT|DROP/ {print $1}'++ cat /tmp/iptables.log++ wc -l+ n=2+ '[' 2 -gt 0 ']'++ tac /tmp/iptables.log+ for n in '`tac /tmp/iptables.log`'+ iptables -D INPUT 2+ for n in '`tac /tmp/iptables.log`'+ iptables -D INPUT 1[root@centos-04 tmp]# iptables -nvL INPUT --line-numbers |grep -w 'dpt:22' |awk '$4 ~/REJECT|DROP/ {print $1}'[root@centos-04 tmp]#

分析日志  

查看date函数用法

[root@centos-04 logs]# man date
[root@centos-04 logs]# 28/Jul/2018:08:04:10^C[root@centos-04 logs]# LANG=en[root@centos-04 logs]# date +%d/%b/%Y:%T11/Mar/2019:04:30:44[root@centos-04 logs]#   

核心命令

[root@centos-04 logs]# egrep "date +%d/%b/%Y:1[01]:[0-5]:[0-9]:" /usr/local/nginx/logs/access.log |awk '{print $1}' |sort -n |uniq -c |sort -n |tail -1 |awk '{print $2}'
[root@centos-04 tmp]# vim 54.sh #!/bin/bash#这个脚本用来分析Nginx访问日志#作者:SYJ#日期:2019-03-22export LANG=enlog="/usr/local/nginx/logs/access.log"t=`date +%d/%b/%Y:1[01]:[0-5][0-9]:`egrep "$t" $log |awk '{print $1}' |sort -n |uniq -c |sort -n |tail -1 |awk '{print $2}'

打印数字 

[root@centos-04 tmp]# read -p "please: " nplease: 4[root@centos-04 tmp]# echo $n4[root@centos-04 tmp]#
[root@centos-04 tmp]# for i in `seq 1 $n`; do echo $i; done1234[root@centos-04 tmp]#
[root@centos-04 tmp]# echo $n4[root@centos-04 tmp]# echo $n |sed 's/[0-9]//g'(判断变量中是否全是数字,将数字全都替换成空,如果还有值说明不全是数字)[root@centos-04 tmp]# n=a[root@centos-04 tmp]# echo $n |sed 's/[0-9]//g'a[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 55.sh #!/bin/bash#这个脚本用来打印数字#作者:SYJ#日期:2019-03-22read -p "Please input a number: " nn1=`echo $n |sed 's/[0-9]//g'`if [ -n "$n1" ]then        echo "Please input a number."        exitfifor i in `seq 1 $n`do        echo $idoneread -p "If continue? y/n" ccase $c in        n|N)                exit                ;;        y|Y)                read -p "Please input a number: " n2                n3=`echo $n2 |sed 's/[0-9]//g'`                if [ -n "$n3" ]                then                        echo "Please input a number."                        exit                fi                if [ $n2 -le $n ]                then                        echo "$n2 should grater than $n."                        exit                fi                for i in `seq $[$n+1] $n2`                do                        echo $i                done                ;;        *)                echo "Please input y or n."        ;;esac
[root@centos-04 tmp]# sh 55.sh  Please input a number: 512345If continue? y/nyPlease input a number: 8678[root@centos-04 tmp]#

给文件增加内容  

 创建一个文件写入1、2、3、4、5、6

[root@centos-04 tmp]# vi 1.txt123456  

在第五列后面添加文本123456789

[root@centos-04 tmp]# sed '5a123456789' 1.txt123451234567896  

添加\n就是回车换行加上-i参数直接修改文件

[root@centos-04 tmp]# sed -i '5a12345\n6789' 1.txt          123451234567896[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 56.sh #!/bin/bash#这个脚本用来为文件增加行#作者:star#日期:2019-03-25n=0cat 1.txt |while read linedo        n=$[$n+1]        if [ $n -eq 5 ]        then                echo $line                echo -e "# This is a test file.\n# Test insert line into this file."        else                echo $line        fidone[root@centos-04 tmp]# sh 56.sh 12345# This is a test file.# Test insert line into this file.6[root@centos-04 tmp]#

备份etc目录  

[root@centos-04 tmp]# date +%d11[root@centos-04 tmp]# date +%y19[root@centos-04 tmp]# date +%Y2019[root@centos-04 tmp]# date +%y%m%d190311[root@centos-04 tmp]# date +%Y%m%d20190311[root@centos-04 tmp]#
[root@centos-04 tmp]# date +%F2019-03-11[root@centos-04 tmp]#   

自动添加shell脚本注释

[root@centos-04 tmp]# vim add_title.sh#!/bin/bashd=`date +%F`cat >$1<
[root@centos-04 tmp]# vim 57.sh #!/bin/bash#这个脚本用来备份/etc/目录#作者:SYJ#日期:2019-03-11d1=`date +%d`d2=`date +%y%m%d`if [ $d1 == "01" ]then        cd /etc/        tar -czf "/root/bak/${d2}_etc.tar.gz" ./fi
[root@centos-04 tmp]# sh 57.sh
[root@centos-04 tmp]# cd /root/bak/[root@centos-04 bak]# ls190301_etc.tar.gz[root@centos-04 bak]#

找出重复的单词  

将非字母的字符全部替换成空格

[root@centos-04 tmp]# cat /etc/passwd |sed 's/[^a-zA-Z]/ /g'root x     root  root  bin bashbin x     bin  bin  sbin nologin  

将字母放到一列

[root@centos-04 tmp]# for w in `cat /etc/passwd|sed 's/[^a-zA-Z]/ /g'`; do echo $w; donerootxrootrootbinbashbinxbin
[root@centos-04 tmp]# for w in `cat /etc/passwd|sed 's/[^a-zA-Z]/ /g'`; do echo $w; done |sort |uniq -c|sort -nr |head     34 x     33 sbin     27 nologin     14 var      8 bin      7 lib      6 user      5 User      4 systemd      4 root[root@centos-04 tmp]#
[root@centos-04 tmp]# sh add_title.sh 58.sh[root@centos-04 tmp]# vim 58.sh #!/bin/bash#这个脚本用来找出重复的单词#作者:SYJ#日期:2019-03-11for w in `sed 's/[^a-zA-Z]/ /g' $1`do        echo $wdone |sort |uniq -c |sort -nr |head[root@centos-04 tmp]# sh 58.sh /etc/passwd     34 x     33 sbin     27 nologin     14 var      8 bin      7 lib      6 user      5 User      4 systemd      4 root[root@centos-04 tmp]#

人员分组

 首先需要有一个人员列表文件

[root@centos-04 tmp]# vim member.txt aaaaaaabbbbcccccddddddddeeeeeeeeeeeffffffgggggggghhhhhhhhh  

需要安装bc命令,bc命令是linux下面的计算器

[root@centos-04 tmp]# yum install -y bc

计算一个字符cksum的值(是一串数字)

[root@centos-04 tmp]# echo adfasdf |cksum3506188467 8[root@centos-04 tmp]#
[root@centos-04 tmp]# echo -e "1\n2\n3\n4\n5"|shuf  (shuf打乱列顺序)32541[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 59.sh #!/bin/bash#这个脚本用来人员分组#作者:SYJ#日期:2019-03-11#人员列表文件f=member.txt#小组数group_n=3#人员总数member_n=`wc -l $f |awk '{print $1}'`#根据姓名计算该用户所在小组的idget_n(){        #根据姓名计算cksum值        l=`echo $1 |cksum|awk '{print $1}'`        #获取一个随机数        n1=$RANDOM        #cksum值和随机数相机,然后除以小组数取余,这样可以确保每次获取到的余数都不一样        n2=$[$n1+$l]        g_id=$[$n1%$group_n]        #假如小组数为7,则余数范围0-6,如果余数为0,则小组为7        if [ $g_id -eq 0 ]        then                g_id=$group_n        fi        echo $g_id}for i in `seq 1 $group_n`do        #n_$i.txt为临时文件,用来记录该小组内的成员        #脚本之前执行过,则该文件会存在,本次执行脚本前应该删除掉这个临时文件        [ -f n_$i.txt ] && rm -f n_$i.txtdoneshuf $f |while read namedo        #计算用户所在小组的id        g=`get_n $name`        #将人员追加写入到他对应的小组里        echo $name >> n_$g.txtdone#定义计算文件行数的函数nu(){        wc -l $1 |awk '{print $1}'}#获取组员人数最多的小组max(){        ma=0;        for i in `seq 1 $group_n|shuf`        do                n=`nu n_$i.txt`                if [ $n -gt $ma ]                then                        ma=$n                fi        done        echo $ma}#获取组员人数最少的小组min(){        mi=$member_n        for i in `seq 1 $group_n|shuf`        do                n=`nu n_$i.txt`                if [ $n -lt $mi ]                then                        mi=$n                fi        done        echo $mi}#定义四舍五入函数div(){        n=`echo "scale=1;$1/$2"|bc`        n1=`echo "scale=1;$n+0.5"|bc`        echo $n1|cut -d. -f1}#小组组员平均值(非四舍五入)ava_n=$[$member_n/$group_n]#小组组员平均值(四舍五入)ava_n1=`div $member_n $group_n`if [ $ava_n -eq $ava_n1 ]then        #定义初始最小值        ini_min=1        #以下while循环要做的事情,就是要把人数多的组里的人搞到人数少的组里去        #此while循环的条件是,当人数最少的组成员数小于组员平均值        while [ $ini_min -lt $ava_n1 ]        do                #找出人数最多的组                m1=`max`                #找出人数最少的组                m2=`min`                for i in `seq 1 $group_n|shuf`                do                        n=`nu n_$i.txt`                        #找到人数最多的组对应的文件f1(可能有多个,这里取出现的第一个即可)                        if [ $n -eq $m1 ]                        then                                f1=n_$i.txt                        #找到人数最少的组对应的文件f2(可能有多个,这里取出现的第一个即可)                             elif [ $n -eq $m2 ]                        then                                f2=n_$i.txt                        fi                done                #取f1中最后一个人名                name=`tail -n1 $f1`                #将这个人名追加写入f2中                echo $name >> $f2                #在f1中删除刚刚取走的人名                sed -i "/$name/d" $f1                #把此时的最少组人员数赋值给ini_min                ini_min=`min`        doneelse        #定义初始最大值        ini_max=$member_n        while [ $ini_max -gt $ava_n1 ]        do                #找出人数最多的组                m1=`max`                #找出人数最少的组                m2=`min`                for i in `seq 1 $group_n|shuf`                do                        n=`nu n_$i.txt`                        #找到人数最多的组对应的文件f1(可能有多个,这里取出现的第一个即可)                        if [ $n -eq $m1 ]                        then                                f1=n_$i.txt                                #找到人数最少的组对应的文件f2(可能有多个,这里取出现的第一个即可)                        elif [ $n -eq $m2 ]                        then                                f2=n_$i.txt                        fi                done                #取f1中最后一个人名                name=`tail -n1 $f1`                #将这个人名追加写入f2中                echo $name >> $f2                #在f1中删除刚刚取走的人名                sed -i "/$name/d" $f1                #把此时的最少组人员数赋值给ini_min                ini_max=`max`        donefifor i in `seq 1 $group_n`do        echo -e "\033[34m$i 组成员有:\033[0m"        cat n_$i.txt        #把临时文件删除        rm -f n_$i.txt        echo done
[root@centos-04 tmp]# sh 59.sh  1 组成员有:aaaaaaaeeeeeeeeeeeffffff2 组成员有:hhhhhhhhhbbbb3 组成员有:ddddddddggggggggccccc[root@centos-04 tmp]#

比较两个数大小  

bc命令返回1代表成立,返回0代表不成立

[root@centos-04 tmp]# x=10.1; y=11[root@centos-04 tmp]# echo "$x > $y"|bc0[root@centos-04 tmp]# echo "$x < $y"|bc1[root@centos-04 tmp]#
[root@centos-04 tmp]# vim 60.sh if_number(){        if echo $1|grep -q '^-'        then                nu=`echo $1|sed 's/^-//'`        else                nu=$1        fi        n=`echo $nu|sed 's/[0-9.]//g'`        if [ -n "$n" ]        then                echo "$1不是合法数字。"                exit        fi        if echo $1|grep -q '^\.'        then                echo "$1不是合法数字。"                exit        fi}if_number $1if_number $2n1=`echo "$1>$2"|bc`if [ $n1 -eq 1 ]then        echo "$1 > $2"else        if [ "$1" == "$2"  ]        then                echo "$1=$2"        else                echo "$1 < $2"        fifi
[root@centos-04 tmp]# sh 60.sh -100 -10-100 < -10[root@centos-04 tmp]# sh 60.sh 100 10  100 > 10[root@centos-04 tmp]#

  

  

  

  

  

  

  

 

转载于:https://www.cnblogs.com/sunyujun/p/10197514.html

你可能感兴趣的文章
Spring Security构建Rest服务-0800-Spring Security图片验证码
查看>>
AE待整理
查看>>
java8中规范的四大函数式接口
查看>>
分类---Logistic Regression
查看>>
【bzoj1270】[BeijingWc2008]雷涛的小猫 dp
查看>>
35.Docker安装Mysql挂载Host Volume
查看>>
2019牛客暑期多校训练营(第三场)- H Magic Line (计算几何)
查看>>
Linux Shell数值比较和字符串比较及相关
查看>>
工作中的一次调试经验
查看>>
pandas合并merge-【老鱼学pandas】
查看>>
鸡和蛋的OO设计
查看>>
Spring-Boot基于配置按条件装Bean
查看>>
使用jenkins配置.net mvc网站进行持续集成二
查看>>
java多线程核心api以及相关概念(一)
查看>>
最大子矩阵
查看>>
linux ssh scp sftp 生成密钥对
查看>>
MAC上parallels安装linux(转载)
查看>>
appium-环境搭建(一)
查看>>
穷爸爸富爸爸里面说的“现金流游戏”靠谱吗?
查看>>
luogu P1046 陶陶摘苹果
查看>>