linux中shell變數$#,$@,$*,$?,$0,$1,$2的含義解釋

linux中shell變數$#,$@,$*,$?,$0,$1,$2的含義解釋 變數說明: $$ Shell本身的PID（ProcessID） $! Shell最後啟動並執行後台Process的PID $? 最後啟動並執行命令的結束代碼（傳回值） $- 使用Set命令設定的Flag一覽 $* 所有參數列表。如"$*"用「"」括起來的情況、以"$1 $2 … $n"的形式輸出所有參數。 $@ 所有參數列表。如"$@"用「"」括起來的情況、以"$1" "$2" … "$n" 的形式輸出所有參數。 $# 添加到Shell的參數個數 $0 Shell本身的檔案名稱 $1～$n 添加到Shell的各參數值。$1是第1參數、$2是第2參數…。 樣本：1 #!/bin/bash 2 # 3 printf"The complete list is %s\n""$$" 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" "$2結果：[Aric@localhost ~]$ bashparams.sh 123456 QQThe complete listis24249The complete listis The complete listis0The complete listis123456 QQThe complete listis123456The complete listisQQThe complete listis2The complete listisparams.shThe complete listis123456The complete listisQQHave a nice day!!!