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查找特定字符串并颜色显示[root@fwq test]# grep -n 'the' regular_express.txt --color=auto8:I can't finish the test.12:the symbol '*' is represented as start.15:You are the best is mean you are the no. 1.16:The world <Happy> is the same with "glad".18:google is the best tools for search keyword.反向选择查找特定字符串并颜色显示[root@fwq test]# grep -vn 'the' regular_express.txt --color=auto1:"Open Source" is a good mechanism to develop programs.2:apple is my favorite food.......忽略大小写查找特定的字符[root@fwq test]# grep -in 'the' regular_express.txt使用 [] 来查找集合字符：[root@fwq test]# grep -n 't[ae]st' regular_express.txt8:I can't finish the test.9:Oh! The soup taste good.查找有‘oo’字符串[root@fwq test]# grep -n 'oo' regular_express.txt1:"Open Source" is a good mechanism to develop programs.2:apple is my favorite food.3:Football game is not use feet only.9:Oh! The soup taste good.18:google is the best tools for search keyword.19:goooooogle yes!查找有‘oo’字符串，但是不要前面有g的，即剔除goo[root@fwq test]# grep -n '[^g]oo' regular_express.txt2:apple is my favorite food.3:Football game is not use feet only.18:google is the best tools for search keyword.19:goooooogle yes!查找非小写字母加oo的内容[root@fwq test]# grep -n '[^a-z]oo' regular_express.txt3:Football game is not use feet only.获取有数字的一行[root@fwq test]# grep -n '[0-9]' regular_express.txt5:However, this dress is about $ 3183 dollars.15:You are the best is mean you are the no. 1.[root@fwq test]# grep -n '[^[:lower:]]oo' regular_express.txt3:Football game is not use feet only.查询以the开头的字符[root@fwq test]# grep -n '^the' regular_express.txt12:the symbol '*' is represented as start.查询开头是小写字母的内容[root@fwq test]# grep -n '^[a-z]' regular_express.txt2:apple is my favorite food.4:this dress doesn't fit me.10:motorcycle is cheap than car.12:the symbol '*' is represented as start.18:google is the best tools for search keyword.19:goooooogle yes!20:go! go! Let's go.查询第一个字符不是大写的[root@fwq test]# grep -n '^[[:lower:]]' regular_express.txt2:apple is my favorite food.4:this dress doesn't fit me.10:motorcycle is cheap than car.12:the symbol '*' is represented as start.18:google is the best tools for search keyword.19:goooooogle yes!20:go! go! Let's go.查询不是以英文开头的字符[root@fwq test]# grep -n '^[^a-zA-Z]' regular_express.txt1:"Open Source" is a good mechanism to develop programs.21:# I am VBird查询结尾是小数点的行的内容.[root@fwq test]# grep -n '.$' regular_express.txt1:"Open Source" is a good mechanism to develop programs.2:apple is my favorite food.3:Football game is not use feet only.4:this dress doesn't fit me.10:motorcycle is cheap than car.11:This window is clear.12:the symbol '*' is represented as start.15:You are the best is mean you are the no. 1.16:The world <Happy> is the same with "glad".17:I like dog.18:google is the best tools for search keyword.20:go! go! Let's go.查找“空白行”[root@fwq test]# grep -n '^$' regular_express.txt22:通配符.和*的使用，.(小数点)代表一定有一个任意字符，*代表重复前一个到无穷多次的意思[root@fwq test]# grep -n 'g..d' regular_express.txt1:"Open Source" is a good mechanism to develop programs.9:Oh! The soup taste good.16:The world <Happy> is the same with "glad".查询出现任意数字的行列[root@fwq test]# grep -n '[0-9][0-9]*' regular_express.txt5:However, this dress is about $ 3183 dollars.15:You are the best is mean you are the no. 1.查询出现两个o的字符串[root@fwq test]# grep -n 'o{2}' regular_express.txt1:"Open Source" is a good mechanism to develop programs.2:apple is my favorite food.3:Football game is not use feet only.9:Oh! The soup taste good.18:google is the best tools for search keyword.19:goooooogle yes!查询出现2-5个o的字符串,后面在接一个g的字符串[root@fwq test]# grep -n 'o{2,5}g' regular_express.txt18:google is the best tools for search keyword.19:goooooogle yes!查询出现2个以上o的字符串,后面在接一个g的字符串[root@fwq test]# grep -n 'o{2,}g' regular_express.txt18:google is the best tools for search keyword.19:goooooogle yes!
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