Matching Control

-i ：Ignore case 忽略大小寫

-w：whole words 按照整個單詞匹配

-v：Invert the sense of matching, to select non-matching lines 匹配不包含指定關鍵字的行

Output Line Prefix Control

-n：line number 在行前顯示行號

Context Line Control

-A NUM：Print NUM lines of trailing context after matching lines. 顯示關鍵字所在行的後NUM行

-B NUM：Print NUM lines of leading context before matching lines. 顯示關鍵字所在行的前NUM行

-C NUM：Print NUM lines of output context 顯示關鍵字前後NUM行

General Output Control

-c ：print a count of matching lines 列印匹配關鍵在所在行的個數