摘抄自:ABS_GUIDE
下载地址:http://www.tldp.org/LDP/abs/abs-guide.pdf
linux中shell变量$#,$@,$0,$1,$2的含义解释: 变量说明: $$ Shell本身的PID(ProcessID) $! Shell最后运行的后台Process的PID $? 最后运行的命令的结束代码(返回值) $- 使用Set命令设定的Flag一览 $* 所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。 $@ 所有参数列表。如"$@"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。 $# 添加到Shell的参数个数 $0 Shell本身的文件名 $1~$n 添加到Shell的各参数值。$1是第1参数、$2是第2参数…。 |
示例:
1 #!/bin/bash 2 # 3 printf "The complete list is %s
" "$$" 4 printf "The complete list is %s
" "$!" 5 printf "The complete list is %s
" "$?" 6 printf "The complete list is %s
" "$*" 7 printf "The complete list is %s
" "$@" 8 printf "The complete list is %s
" "$#" 9 printf "The complete list is %s
" "$0" 10 printf "The complete list is %s
" "$1" 11 printf "The complete list is %s
" "$2 |
结果:
[Aric@localhost ~]$ 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