巴什 - 查找文件中的关键字，并删除其行 [英] Bash - find a keyword in a file and delete its line

问题描述

我想给一个关键字，找到行其中，在该文件中出现的关键字和擦除整条生产线。

I'd like to give a keyword, find the line where this keyword aṕpears in a file and erase the entire line.

这是我得到了什么，但它不工作，因为它应该：

This is what I got but it is not working as it should:

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

更新

这是对我工作：

的sed -e -i_bak/domain\\.com/d/ etc / hosts中

不过，我有两条线domain.com，有没有办法告诉SED，其确切的关键字domain.com似乎只删除行

However, as I had two lines with "domain.com", is there a way to tell sed to erase only the line where the exact keyword "domain.com" appears

这是/ etc / hosts文件的原始内容：

This is the original content of /etc/hosts:

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

下面的命令后是如何结束的sed -e -i_bak/domain\\.com/d/ etc / hosts中：

127.0.0.1       localhost       localhost.localdomain

我试过的sed -e -i_bak/\\<namourphoto\\.com\\.br\\>/d〜/桌面/主机，但它没'将不起作用。

I tried sed -i_bak -e '/\<namourphoto\.com\.br\>/d' ~/Desktop/hosts but it didn't work.

结论

这是我想出了（基于帮助乡亲罚款给我）的code：

This is the code I came up with (based on the help the fine folks have given me):

D=domain.com
DOMAIN=`echo "$D" | sed 's/\./\\\\./g'`
sed -i_bak -e "/[\t]$DOMAIN/d" /etc/hosts

需要注意的是：

• 我指望总有要删除的域之前，标签

• I am counting that there is always a tab before the domain to be erased

我自动转义域名点。

推荐答案

使用流编辑器，sed的：

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

以上将删除包含的过失的在test.txt的线条。它会创建原始（名为test.txt.bak）的备份，并将修改就地原始文件。

The above will delete lines containing culpa in test.txt. It will create a backup of the original (named test.txt.bak) and will modify the original file in-place.

这篇关于巴什 - 查找文件中的关键字，并删除其行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！