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                ``` grep 常用的一個強大的文本搜索命令 grep [參數] [關鍵字] <文件名> ``` ``` [root@ecs-a672-0003 ~]# cat grep.txt aaaaaa bbbbbb cccccc aaaaaa dddddd [root@ecs-a672-0003 ~]# grep -c aaaaaa grep.txt 2 [root@ecs-a672-0003 ~]# grep -n aaaaaa grep.txt 1:aaaaaa 4:aaaaaa [root@ecs-a672-0003 ~]# grep -v aaaaaa grep.txt bbbbbb cccccc dddddd ``` ``` 小技巧: 精確定位錯誤代碼 grep -nr [錯誤關鍵字] * ```
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