#!/bin/bash

#Created by ley on 2014-11-14

#Testing the Paramters

echo  "The compleate list is %s\n" "$$"  

echo  "The compleate list is %s\n" "$!"

echo  "The compleate list is %s\n" "$?"

echo  "The compleate list is %s\n" "$*"

echo  "The compleate list is %s\n" "$@"

echo  "The compleate list is %s\n" "$#"

echo  "The compleate list is %s\n" "$0"

echo  "The compleate list is %s\n" "$1"

echo  "The compleate list is %s\n" "$2"

linux中shell变量$#,$@,$0,$1,$2的含义解释: 
变量说明: 
$$ 
Shell本身的PID（ProcessID） 
$! 
Shell最后运行的后台Process的PID 
$? 
最后运行的命令的结束代码（返回值） 
$- 
使用Set命令设定的Flag一览 
$* 
所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。 
$@ 
所有参数列表。如"$@"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。 
$# 
添加到Shell的参数个数 
$0 
Shell本身的文件名 
$1～$n 
添加到Shell的各参数值。$1是第1参数、$2是第2参数…。

[root@localhost ~]# ./params.sh 123456 QQ

The compleate list is %s\n 3406 

The compleate list is %s\n 

The compleate list is %s\n 0

The compleate list is %s\n 123456 QQ

The compleate list is %s\n 123456 QQ

The compleate list is %s\n 2

The compleate list is %s\n ./params.sh

The compleate list is %s\n 123456

The compleate list is %s\n QQ

本文出自 “linux运维分享” 博客，请务必保留此出处http://liangey.blog.51cto.com/9097868/1576471

linux中shell变量$#,$@,$0,$1,$2的含义