我希望将SCP的输出重定向到文件，但只有与模式匹配的行。例如，我得到了很多许可，拒绝了错误，因此我想记录所有情况的所有文件。我发现我可以将SCP的所有输出重定向到这样的文件：
source my_scp_script.sh > output.log 2>&1
脚本只是对SCP的简单调用。我遇到了如何匹配诸如“权限拒绝”之类的模式，而仅将这些行写入文件，而不是所有内容，因为有成千上万的文件成功。
编辑：我忘了澄清一下我已经尝试使用GREP，但是这样做时它不起作用 source my_scp_script.sh | GREP许可＆GT; output.log
I want redirect output from scp into a file, but only lines that match a pattern. For example, I'm getting a lot of permission denied errors, so I want to log all the files where that is the case. I found that I can redirect all output of scp into a file like this:
source my_scp_script.sh > output.log 2>&1
The script is just a simple call to scp. I'm stuck on how I can match a pattern like "Permission Denied" and only write those lines to the file, not everything since there are thousands of files that are successful.
EDIT: I forgot to clarify that I have tried using grep, but it does not work when doing it like this source my_scp_script.sh | grep Permission > output.log
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scp没有什么特别的;您只需要熟悉shell i/o linux文档项目的 高级bash-scripting指南 IMO是一个很好的信息资源； href =“ https://tldp.org/ldp/abs/html/io-redirection.html” rel =“ nofollow noreferrer”>§20i/o重定向包含一个不错的摘要。）您可以使用<<<<< ）代码>源my_scp_script.sh 1＆gt; /tmp/stdout 2＆gt; /tmp/stderr 将写入的输出重定向到文件描述符
1（aka stdout ;请注意，1＆gt;也可以是写为＆gt;，更常用）和2（aka stderr）到临时文件。然后，您可以检查/tmp/std {out，err}，并会发现权限拒绝错误错误 stderr。一个简单< a href =“ https://www.gnu.org/software/bash/manual/html_node/pipelines.html” rel =“ nofollow noreferrer“>管道
| grep将 stdout 与grep's stdin ，但是，由于您需要连接 stderr ，因此您可以
将文件描述符
2重定向到文件描述符11 piping之前 stdout togrep。使用
|＆amp;是2＆gt; 1 |的快捷方式，您最终可以将其简化为：There is nothing special about
scp; you just need to get familiar with shell I/O redirections.(The Linux Documentation Project's Advanced Bash-Scripting Guide is IMO a great resource of information; §20 I/O Redirection contains a nice summary.)
You could use
source my_scp_script.sh 1> /tmp/stdout 2> /tmp/stderrto redirect the output written to the file descriptors1(aka stdout; note that1>can also be written as>, which is more commonly used) and2(aka stderr) to temporary files. You can then inspect/tmp/std{out,err}and will find that the Permission Denied errors are written to stderr.A simple pipeline
| grepconnects stdout withgrep's stdin,but as you need to connect stderr, you can use
to redirect file descriptor
2to file descriptor1before piping the combined stdout togrep.With
|&being a shortcut for2>&1 |, you can finally simplify this to: