http://www.cnblogs.com/fhefh/archive/2011/04/15/2017613.html
系列shell博客总结
http://www.cnblogs.com/fhefh/archive/2011/04/15/2017613.html
linux中shell变量$#,$@,$0,$1,$2的含义解释: 变量说明: $$ Shell本身的PID（ProcessID） $! Shell最后运行的后台Process的PID $? 最后运行的命令的结束代码（返回值） $- 使用Set命令设定的Flag一览 $* 所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。 $@ 所有参数列表。如"$@"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。 $# 添加到Shell的参数个数 $0 Shell本身的文件名 $1～$n 添加到Shell的各参数值。$1是第1参数、$2是第2参数…。
实例：
#!/bin/bash # printf "The complete list is %s " "$$" printf "The complete list is %s " "$!" printf "The complete list is %s " "$?" printf "The complete list is %s " "$*" printf "The complete list is %s " "$@" printf "The complete list is %s " "$#" printf "The complete list is %s " "$0" printf "The complete list is %s " "$1" 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 Have a nice day!!!