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执行脚本查看用户(DUSHAN)如存在则提示用户存在并退出,如不存在自动创建并提示创建成功,密码设为123456
#!/bin/bash #************************************************************************* #Author: Dadda_Du #QQ: 316722220 #Date: 2018-08-04 #FileName: idname_60.sh #URL: https://blog.csdn.net/weixin_40001704 #Description: command idname test user exist? #Copyright(C): 2018 all rights reserved #************************************************************************* name=dushan id $name &>/dev/null && { echo $name is exist!;exit; } || { useradd $name ; echo $name is create!; } && ( `echo 123456 | passwd --stdin $name &>/dev/null` )
(注意:括号里每个单词之间注意空格;邮箱路径/var/spool/mail/用户名;家目录路径/home/用户名)
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执行此脚后磁盘大于66%发送广播并同时报送当前INODE使用情况
#!/bin/bash #************************************************************************* #Author: Dadda_Du #QQ: 316722220 #Date: 2018-08-04 #FileName: checkdisk_60.sh #URL: https://blog.csdn.net/weixin_40001704 #Description: check the disk full? #Copyright(C): 2018 all rights reserved #************************************************************************* Diskuse=`df|grep /dev/sd|egrep -o '[0-9]{1,3}%'|egrep -o '[0-9]{1,3}'|sort -nr|head -n1` InodeNum=`df -i|egrep -o '[0-9]{1,3}%'|egrep -o '[0-9]{1,3}'|sort -nr|head -n1` n=1 [ $Diskuse -gt $n ] && wall "Disk use >(gt) $n%" [ $InodeNum -eq $n ] && wall "Inode use eq $n%"
(注意:中括号与内容间空格,中括号内变量添加双引号,避免报错)
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执行此脚本后判断系统版本
#!/bin/bash #************************************************************************* #Author: Dadda_Du #QQ: 316722220 #Date: 2018-08-04 #FileName: checkversion_60.sh #URL: https://blog.csdn.net/weixin_40001704 #Description: Checkversion 6 or 7? #Copyright(C): 2018 all rights reserved #************************************************************************* ver=` egrep -o "[0-9]+" /etc/redhat-release|head -n1` [ "$ver" -eq 7 ] && echo "Centos7" || echo "Centos6"
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执行此脚本后可判断键入内容(191.191.111.111)是否为合法IP
#!/bin/bash #************************************************************************* #Author: Dadda_Du #QQ: 316722220 #Date: 2018-08-04 #FileName: checkip_60.sh #URL: https://blog.csdn.net/weixin_40001704 #Description: Legal IP? #Copyright(C): 2018 all rights reserved #************************************************************************* IP=191.191.111.111 [[ "$IP" =~ ^(([1-9]?[0-9]|1[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.){3}([1-9]?[0-9]|1[0-9]?[0-9]|2[0-4][0-9]|25[0-5])$ ]] && echo "The $IP is legal!" || echo "The $IP is illegal!!"
(注意:中括号中的变量要加双引号,正则表达式后面判断内容不要加双引号)