转自:http://www.cnblogs.com/fhefh/archive/2011/04/15/2017613.html
linux中shell变量$#,[email protected],$0,$1,$2的含义解释:
变量说明:
$$
Shell本身的PID(ProcessID)
$!
Shell最后运行的后台Process的PID
$?
最后运行的命令的结束代码(返回值)
$-
使用Set命令设定的Flag一览
$*
所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。
[email protected]
所有参数列表。如"[email protected]"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。
$#
添加到Shell的参数个数
$0
Shell本身的文件名
$1~$n
添加到Shell的各参数值。$1是第1参数、$2是第2参数…。
1 #!/bin/bash 2 # 3 printf "The complete list is %s\n" "$$" 4 printf "The complete list is %s\n" "$!" 5 printf "The complete list is %s\n" "$?" 6 printf "The complete list is %s\n" "$*" 7 printf "The complete list is %s\n" "[email protected]" 8 printf "The complete list is %s\n" "$#" 9 printf "The complete list is %s\n" "$0" 10 printf "The complete list is %s\n" "$1" 11 printf "The complete list is %s\n" "$2 结果: [[email protected] ~]$ bash params.sh 123456 QQ The complete list is 24249 The complete list is The complete list is 0 The complete list is 123456 QQ The complete list is 123456 The complete list is QQ The complete list is 2 The complete list is params.sh The complete list is 123456 The complete list is QQ
时间: 2024-12-24 08:50:01