linux中shell變量$#,$@,$0,$1,$2的含義解釋(jieshi): 變量說明(shuoming): $$ Shell本身(benshen)的PID（ProcessID） $! Shell最后(zuihou)運(yùn) 行(running)的后臺(tái)Process的PID $? 最后(zuihou)運(yùn) 行(running)的命令的結(jié)束(jieshu)代碼（返回(fanhui)值） $- 使用(shiyong)Set命令設(shè)定的Flag一覽 $* 所有(suoyou)參數(shù)列表。如"$*"用「"」括起來的情況(qingkuang)、以"$1 $2 … $n"的形式(xingshi)輸出(shuchu)所有(suoyou)參數(shù)。 $@ 所有(suoyou)參數(shù)列表。如"$@"用「"」括起來的情況(qingkuang)、以"$1" "$2" … "$n" 的形式(xingshi)輸出(shuchu)所有(suoyou)參數(shù)。 $# 添加(tianjia)到Shell的參數(shù)個(gè)數(shù) $0 Shell本身(benshen)的文件名 $1～$n 添加(tianjia)到Shell的各參數(shù)值。$1是第1參數(shù)、$2是第2參數(shù)…。 示例：1 #!/bin/bash2 #3 printf "The complete list is %s\n" "$$"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" "$2結(jié)果(jieguo)：[Aric@localhost ~]$ bash params.sh 123456 QQThe complete list is 24249The complete list is The complete list is 0The complete list is 123456 QQThe complete list is 123456The complete list is QQThe complete list is 2The complete list is params.shThe complete list is 123456The complete list is QQ
posted on 2012-04-24 23:24
kxbin 閱讀(478)
評(píng)論(0) 編輯 收藏 所屬分類:
Linux