bash shell脚本之查看系统环境变量

查看当前系统环境变量

cat test2:

#!/bin/bash
# display user information from the system.
echo "User info for userid:$USER"
echo UID:$UID
echo HOME:$HOME

添加执行权限：chmod u+x test2

运行：./test2 结果如下：

User info for userid:clarck
UID:
HOME:/home/clarck