linux中shell變數$#,$@,$0,$1,$2的含義

標籤：linux   $$   

#!/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" "[email protected]"

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變數$#,[email protected],$0,$1,$2的含義解釋: 
變數說明: 
$$ 
Shell本身的PID（ProcessID） 
$! 
Shell最後啟動並執行後台Process的PID 
$? 
最後啟動並執行命令的結束代碼（傳回值） 
$- 
使用Set命令設定的Flag一覽 
$* 
所有參數列表。如"$*"用「"」括起來的情況、以"$1 $2 … $n"的形式輸出所有參數。 
[email protected] 
所有參數列表。如"[email protected]"用「"」括起來的情況、以"$1" "$2" … "$n" 的形式輸出所有參數。 
$# 
添加到Shell的參數個數 
$0 
Shell本身的檔案名稱 
$1～$n 
添加到Shell的各參數值。$1是第1參數、$2是第2參數…。

[[email protected] ~]# ./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營運分享” 部落格，請務必保留此出處http://liangey.blog.51cto.com/9097868/1576471

linux中shell變數$#,[email protected],$0,$1,$2的含義