摘抄自：ABS_GUIDE
下載地址：http://www./LDP/abs/abs-guide.pdf
linux中shell變量$#,$@,$0,$1,$2的含義解釋:
變量說明:
$$
Shell本身的PID（ProcessID）
$!
Shell最后運行的后臺Process的PID
$?
最后運行的命令的結(jié)束代碼（返回值）
$-
使用Set命令設(shè)定的Flag一覽
$*
所有參數(shù)列表。如"$*"用「"」括起來的情況、以"$1 $2 … $n"的形式輸出所有參數(shù)。
$@
所有參數(shù)列表。如"$@"用「"」括起來的情況、以"$1" "$2" … "$n" 的形式輸出所有參數(shù)。
$#
添加到Shell的參數(shù)個數(shù)
$0
Shell本身的文件名
$1～$n
添加到Shell的各參數(shù)值。$1是第1參數(shù)、$2是第2參數(shù)…。 |
示例：
1 #!/bin/bash
2 #
3 printf "The complete list is %s\n" "$$"
4 printf "The complete list is %s\n" "$!"
5 printf "The complete list is %s\n" "$?"
6 printf "The complete list is %s\n" "$*"
7 printf "The complete list is %s\n" "$@"
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" "$2
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結(jié)果：
[Aric@localhost ~]$ 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
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