Execute script parameter acquisition in Linux

Linux variable $[#,@,0,1,2,*,$,?] Meaning

$# 是传给脚本的参数个数

$ 0 是脚本本身的名字 $ 1 是传递给该shell脚本的第一个参数 $ 2 是传递给该shell脚本的第二个参数 [email protected] 是传给脚本的所有参数的列表 $* 是以一个单字符串显示所有向脚本传递的参数，与位置变量不同，参数可超过 9 个 $$ 是脚本运行的当前进程ID号 $? 是显示最后命令的退出状态， 0 表示没有错误，其他表示有错误

Difference: [email protected], $*

Same point: All parameters are referenced
Differences: $* and [email protected] All represent all parameters passed to a function or script, and are not enclosed by double quotation marks (""), with "$" "$" ... All parameters are output in the form "$n". But when they are enclosed in double quotation marks (""), "$*" takes all the parameters as a whole and outputs all parameters in the form of "$ $ ... $n"; "[email protected]" separates the various parameters to "$" "$" ... All parameters are output in the form "$n".

$* and [email protected] detailed differences please see here

#!/bin/BashEcho "-----------------" forKeyinch "[email protected]" Do    Echo '[email protected]'$key DoneEcho "-----------------------------" forKey2inch$* Do    Echo '$*'$key 2 Done1, quoted execution and results: [[email protected]~]# Bashfile.SHLinux "python C" -----------------[email protected] linux[email protected] python c-----------------------------$*linux$*python$*C2, without quotes execution and results: [[email protected]~]# Bashfile.SHLinux python c-----------------[email protected] linux[email protected] python[email protected] C-----------------------------$*linux$*python$* C

Execute script parameter acquisition in Linux