Linux 使用 sed 删除文本块
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Using sed to remove a block of text
提问by Scott C Wilson
I have a block of text that looks like this:
我有一个看起来像这样的文本块：
<!-- BOF CLEAN -->
... a bunch of stuff
<!-- EOF CLEAN -->
I'd like to remove this entire block. What's the sed command?
我想删除整个块。sed 命令是什么？
采纳答案by Maxim Egorushkin
$ cat text
abc
<!-- BOF CLEAN -->
... a bunch of stuff
<!-- EOF CLEAN -->
def
$ sed '/<!-- BOF CLEAN -->/,/<!-- EOF CLEAN -->/d' text
abc
def
http://www.catonmat.net/blog/sed-one-liners-explained-part-three/
http://www.catonmat.net/blog/sed-one-liners-explained-part-three/
回答by Nadir Latif
To remove all the text starting from and including <!-- BOF CLEAN -->and ending at and including <!-- EOF CLEAN -->, use following sed command:
要删除从 和包括 开始并<!-- BOF CLEAN -->以和包括结束的所有文本 <!-- EOF CLEAN -->，请使用以下 sed 命令：
sed -i '/<!-- BOF CLEAN -->/,/<!-- EOF CLEAN -->/d' file_name;
Reference: Delete text or paragraph between two sections using sed
回答by Scott C Wilson
These days I am using the /smodifier to do this. I noticed no one mentioned that. I use markup with is free of spaces too like
这些天我正在使用/s修改器来做到这一点。我注意到没有人提到这一点。我使用的标记也没有空格
{bof-nf}
... a bunch of stuff
{eof-nf}
{bof-nf}
... a bunch of stuff
{eof-nf}
So for example, to remove this block, use
例如，要删除此块，请使用
$newcontent = preg_replace("/\{bof-nf\}(.*)\{eof-nf\}\\n/s", "", $newcontent);
$newcontent = preg_replace("/\{bof-nf\}(.*)\{eof-nf\}\\n/s", "", $newcontent);
To keep the block but remove the tags, use
要保留块但删除标签，请使用
$newcontent = preg_replace("/\{bof-nf\}.*\\n/", "", $newcontent);
$newcontent = preg_replace("/\{eof-nf\}.*\\n/", "", $newcontent);
$newcontent = preg_replace("/\{bof-nf\}.*\\n/", "", $newcontent);
$newcontent = preg_replace("/\{eof-nf\}.*\\n/", "", $newcontent);
