shell学习笔记二 参数和环境变量

这次要学习一下，参数和环境变量

 

#!/bin/sh echo "The program's name is $0" echo "The first parameter is $1" echo "The second parameter is $2" echo "The parameter list is $*" echo "The user's home directory is $HOME" exit 0

 

在终端中输入：./ex_02.sh hello killua

 

执行结果：

The program's name is ./ex_02.sh The first parameter is hello The second parameter is killua The parameter list is hello killua The user's home directory is /home/killua

 

PS:主要环境变量都是大写的，写$Home 程序不会报错，但是没有结果