bash shell if 正则

参考博客：https://blog.csdn.net/haobashenmegui/article/details/103630550

参考博客:https://www.cnblogs.com/gaochsh/p/6901807.html

在[[…]]里面不要双引号

#!/usr/bin/bash

s="hello"
s2="good"

if [[ ${s} =~ (^he*)|(^go*) ]];then
    echo "success!"
else
    echo "failed!"
fi

if [[ ${s2} =~ (^he*)|(^go*) ]];then
    echo "success!"
else
    echo "failed!"
fi

newip='192.168.1.100'
reg='^([0-9]{1,3}.){3}[0-9]{1,3}$'
if [[ "$newip" =~ $reg ]];then
    echo '找到了ip地址'
fi