忽略大小写开关和插入符号未按预期使用grep_Grep_Osx Lion

忽略大小写开关和插入符号未按预期使用grep

grep

忽略大小写开关和插入符号未按预期使用grep,grep,osx-lion,Grep,Osx Lion,给定以下文件： this is some words and this one too<div> <html></html> and more words 123 Caps to begin ASDFSDFSDF 给予给予但是及应该确保行以字母数字开头的插入符号把一切都搞糟了。为什么“this is some words”行和“Caps to begin”行不匹配？这是在Mac Lion上使用bash。我相信您需要的是： grep '^[[:alp

给定以下文件：

this is some words
and this one too<div>
<html></html>
and more words 123
Caps to begin
ASDFSDFSDF

给予

但是

及

应该确保行以字母数字开头的插入符号把一切都搞糟了。为什么“this is some words”行和“Caps to begin”行不匹配？

这是在Mac Lion上使用bash。

我相信您需要的是：

grep '^[[:alpha:]]' testfile
grep -i '^[[:alpha:]]' testfile

啊,对。我把语法“[:alpha:][]”和“[a-z]”搞混了。Grep和疲倦不能很好地结合。。

this is some words
and this one too<div>
<html></html>
and more words 123
Caps to begin
ASDFSDFSDF

grep '[:alpha:]' testfile

this is some words
and this one too<div>
<html></html>
and more words 123
Caps to begin

grep '^[:alpha:]' testfile

and this one too<div>
and more words 123

grep -i '^[:alpha:]' testfile

and this one too<div>
and more words 123
ASDFSDFSDF

grep '^[[:alpha:]]' testfile
grep -i '^[[:alpha:]]' testfile