grep 是否支持?和+特殊字符

zhulei5

做个试验：

grep.txt 文件内容如下：
I like golf.
Golf is played on grass.
I created gilf.
What is g2lf?
This time the o is missing in glf.
Some people might say goolf.
But they would not say goilf.

执行以下两句搜索命令都没有输出，很奇怪。
#grep go?lf grep.txt
#grep go+lf grep.txt

hohoxu_hao115

2. grep 'go\?lf' grep.txt
3. grep 'go\+lf' grep.txt
5. grep -E go?lf grep.txt
6. grep -E go+lf grep.txt

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huan

fgrep吧

feiliang1983

用egrep

bobkey

? 表示0次或1次
+1次或多次
*0次或多次

用grep -E [go*]lf

Jockey

Post by hohoxu_hao115

1. 
   
2. cat 工资表 | egrep '^hohoxu_hao115' | sed -r -e 's/\<[1-9]+0+\>/&0000000000000/g'
   

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当cat只有一个参数并且把标准输出传进一个管道时，大多数时候意味着该用户在浪费时间...

seamonkey

我最喜欢给人发uuoc奖了

huan

啥是uuoc啊

huan

useless use of cat ? 呵

Iambitious

的确阿，我也经常犯cat滥用的错误啊