bash shell脚本之成员变量

shell中变量的使用

cat test3:

#!/bin/bash
# testing variables
days=
guest="Katie"
echo "$guest checked in $days days ago"
days=
guest="Jessica"
echo "$guest checked in $days days ago"

添加可执行权限：chmod u+x test3

运行：./test3 结果如下：

Katie checked in  days ago
Jessica checked in  days ago