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How to delete from a text file, all lines that contain a specific string? (21 answers)

Closed 10 years ago.

我愿作一个关键词,找到这一关键词在档案中拼凑一字,删除整个线。

这是我所说的话,但它并没有发挥应有的作用:

KEYWORD= domain.com 
cat /etc/hosts | grep -v "$KEYWORD" > /etc/hosts

<>>>>>

This is what worked for me:

ed -i_bak -e /domain.com/d /etc/hosts

然而,由于我有两条“主要.com”,因此,只有删除“重要......”的确切关键词的行文。

这是/etc/hosts的原始内容:

127.0.0.1       localhost       localhost.localdomain
222.111.22.222      hvn.domain.com
222.111.22.222      domain.com

Here s how it end up after the command ed -i_bak -e /domain.com/d /etc/hosts:

127.0.0.1       localhost       localhost.localdomain

I tried sed -i_bak -e /<namourphoto.com.br>/d ~/Desktop/hosts but it didn t work.

http://www.ohchr.org。

这是我所起草的法典(根据优秀的民俗给予我的帮助):

D=domain.com
DOMAIN=`echo "$D" | sed  s/./\\./g `
sed -i_bak -e "/[	]$DOMAIN/d" /etc/hosts

注:

我估计,要消除的领域总是有一个表象。
我自动放弃域名的钥匙。

Answer 1

使用流编辑 ,原文如下:

sed -i ".bak"  /culpa/d  test.txt

以上将删除测试中包含culpa的线。它将为原案(改名为测试.txt.bak)提供佐证,并将在现场修改原始档案。

Answer 2

Pipe it to another file, not the same one that you re reading from, and be careful with the useless use of cat.

grep -v "$KEYWORD" /etc/hosts > newfile

除了对ed子的细微回答外,你还可以使用Perl和稍加改进的reg,以解决这个问题:

perl -pi.old -e  s/.*sdomain.coms*
//  file

Notice I m considering domain.com will be isolated by space characters (tabs or spaces, and so on), and that nothing but zero or more spaces will appear after it until the newline. Similarly to -i in sed,
-i.old in perl sets the $^I variable, and your original file will receive the changes while a copy will be kept under the old name and a .old appended.

Answer 3

如果你只想删除你榜样档案的最后一段。

sed -i  /[[:space:]]+domain.com/d  test.txt

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