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