字符串比较
时间：2019-04-16 23:59:04 来源:igfitidea点击:
shell判断字符串是否相等
语法
STRING1 = STRING2
示例
#!/bin/bash
pass="theitroad"
echo
if test "$pass" = "theitroad"
then
echo "password is correct!"
fi
shell判断字符串是否不相等
语法
STRING1 != STRING2
示例
#!/bin/bash
pass="theitroad"
echo
if test "$pass" != "theitroad"
then
echo "wrong password!"
fi
shell判断字符串长度是否为0
语法
-z STRING
示例
#!/bin/bash
read -s -p "请输入密码 " pass
echo
if test -z $pass
then
echo "密码不能为空!"
exit 1
fi
