linux - Linux删除文件中的多行

我是iOS开发人员，不熟悉Linux，我搜索了很长时间，但仍然无法解决我的问题。希望有人能帮助我，谢谢！

删除之前：

Other contents......

#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

Other contents......

删除后：

Other contents......
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更新

我正在写一个shell脚本（不能使用其他语言。）。在用户系统上，有一个名为abc的文本文件，内容可能是这样的：

# Other comments......
# Other comments......
# Other comments......
Other contents......
# Other comments......

#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

# Other comments......
Other contents......
# Other comments......
# Other comments......

哪个Other contents ......是虚构的，不能将其用作删除条件。

我只需要删除以下部分：

#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

不需要删除此文件中的其他内容。

因为它在用户的系统上运行，所以我不知道要删除的内容的行号。

最后看起来像这样：

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我认为答案可能是这样的：

sed xxxxxx abc.txt

awk xxxxxx abc.txt

最佳答案

这将严格删除您要求的内容：

$ cat bad
#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

。

$ cat file
# Other comments......
# Other comments......
# Other comments......
Other contents......
# Other comments......

#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

# Other comments......
Other contents......
# Other comments......
# Other comments......

。

$ awk -v RS='^$' -v ORS= 'NR==FNR{bad=$0;next} s=index($0,bad){$0=substr($0,1,s-1) substr($0,s+length(bad))} 1' bad file
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$

它使用GNU awk进行多字符RS。如果需要，它也可以在其他awks中轻松实现，但是在我们确定这是否是您正在寻找的解决方案之前，不会付出任何努力。

在字符串中有坏：

$ awk -v RS='^$' -v ORS= -v bad="#
# Proxy server for iTerm & Terminal Setup Script
# version 0.1
# VincentSit
# Nov 26, 2014
#
function start_proxy {
 export http_proxy='abc.efgh.com:1234'
 export HTTPS_PROXY='abc.efgh.com:1234'
 }

function stop_proxy {
 export http_proxy=''
 export HTTPS_PROXY=''
 }

" 's=index($0,bad){$0=substr($0,1,s-1) substr($0,s+length(bad))} 1' file
# Other comments......
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Other contents......
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关于linux - Linux删除文件中的多行，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/27164854/