blocks|key|2927634|text|for+file+in+*
do
++[+"$file"+=+outfile.txt+]+&&+continue
++head+-n+1+"$file"
++grep+-i+'...'+"$file"
done+>+outfile.txt|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2927635|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>for file in *
do
 [ "$file" = outfile.txt ] &amp;&amp; continue
 head -n 1 "$file"
 grep -i '...' "$file"
done &gt; outfile.txt
</code></pre>

blocks|key|5142280|text|嗨，好奇，你可以在cmd中使用xargs。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5142281|find+/mahesh++-type+f+%7Cxargs+-I+{}+-t+/bin/sh+-c+"head+-1+{}>>/tmp/out.x%7Cgrep+-i+6330162+{}+>>/tmp/out.x"|code-block|syntax|javascript|5142282|其中/mahesh是存放文件的目录，输出放在/tmp/out.x中|5142283|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Hi Curious you can use xargs with your cmd.

<pre><code>find /mahesh -type f |xargs -I {} -t /bin/sh -c "head -1 {}&gt;&gt;/tmp/out.x|grep -i 6330162 {} &gt;&gt;/tmp/out.x"
</code></pre>

Where /mahesh is dir in which your files are and output is placed inside /tmp/out.x

blocks|key|5051649|text|下面的代码意味着您只需要输入一次命令(而不是使用&&并输入两次)，它也很容易理解。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5051650|some-command+%7C+{+head+-1;+grep+some-stuff;+}|code-block|syntax|javascript|5051651|例如：|5051652|ps+-ef+%7C+{+head+-1;+grep+python;+}|5051653|更新:这似乎只适用于ps，抱歉，但我猜这通常是人们想要的。|offset|length|style|CODE|5051654|如果你想让它对任意命令起作用，似乎你必须写一个迷你脚本，例如：|5051655|#!/bin/bash

first_line=true

while+read+-r+line;+do
++++if+[+"${first_line}"+=+"true"+];+then
++++++++echo+"$line"
++++++++first_line=false
++++fi
++++echo+"$line"+%7C+grep+$*
done|5051656|然后，您可以像这样使用：|5051657|ps+-ef+%7C+./hgrep.sh+-i+chrome|5051658|这种方法的好处是我们使用了grep，所以所有的标志都是完全一样的。|5051659|entityMap^0|0|0|0|0|A|2|0|0|0|0|0|D|4|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@$M|17|N|18|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1B|8|@]|9|@]|A|$]]|$1|W|3|X|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|Y|3|Z|5|6|7|1D|8|@$M|1E|N|1F|O|P]]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|11|$]]

The following means you only need type the command once (rather than using &amp;&amp; and typing it twice), it's also quite simple to understand.

<pre><code>some-command | { head -1; grep some-stuff; }
</code></pre>

e.g.

<pre><code>ps -ef | { head -1; grep python; }
</code></pre>

UPDATE: This only seems to work for <code>ps</code>, sorry, but I guess this is usually what people want this for.

If you want this to work for an arbitrary command, it seems you must write a mini script, e.g.:

<pre><code>#!/bin/bash

first_line=true

while read -r line; do
 if [ "${first_line}" = "true" ]; then
 echo "$line"
 first_line=false
 fi
 echo "$line" | grep $*
done
</code></pre>

Which I've named <code>hgrep.sh</code>. Then you can use like this:

<pre><code>ps -ef | ./hgrep.sh -i chrome
</code></pre>

The nice thing about this approach is that we are using <code>grep</code> so all the flags work exactly the same.

blocks|key|2927815|text|我会这么做的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2927816|ps+-fe+%7C+awk+'{+if+(+tolower($0)+~+/network/+%7C%7C+NR+==+1+)+print+$0}'+|code-block|syntax|javascript|2927817|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I would have done that : 

<pre><code>ps -fe | awk '{ if ( tolower($0) ~ /network/ || NR == 1 ) print $0}' 
</code></pre>

blocks|key|2927949|text|这将通过使用单个接收命令来工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2927950|some-command+%7C+sed+-n+'1p;/PATTERN/p'|code-block|syntax|javascript|2927951|这也很容易与多行标题一起使用：|2927952|$+sudo+netstat+--tcp+--udp+--listening+--numeric+--program+%7C+sed+--quiet+'1,2p;/ssh/p'
Active+Internet+connections+(only+servers)
Proto+Recv-Q+Send-Q+Local+Address+++++++++++Foreign+Address+++++++++State+++++++PID/Program+name++++
tcp++++++++0++++++0+0.0.0.0:22++++++++++++++0.0.0.0:*+++++++++++++++LISTEN++++++1258/sshd+++++++++++
tcp6+++++++0++++++0+:::22+++++++++++++++++++:::*++++++++++++++++++++LISTEN++++++1258/sshd+++++++++++|2927953|对于reiterate来说，@samthebest的解决方案只能在非常特定的情况下工作；这将适用于任何写入标准输出的命令。|offset|length|2927954|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/12920317/include-header-in-the-grep-result/50204811#comment87426554_19356846^0|0|0|0|0|2|9|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

This will work by using a single receiving command:

<pre><code>some-command | sed -n '1p;/PATTERN/p'
</code></pre>

It's also easy to use this with multi-line headers:

<pre><code>$ sudo netstat --tcp --udp --listening --numeric --program | sed --quiet '1,2p;/ssh/p'
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name 
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1258/sshd 
tcp6 0 0 :::22 :::* LISTEN 1258/sshd 
</code></pre>

To <a href="https://stackoverflow.com/questions/12920317/include-header-in-the-grep-result/50204811#comment87426554_19356846">reiterate</a>, @samthebest's solution will only work in very specific situations; this will work with any command that writes to standard output.

blocks|key|5142625|text|我编写了一个脚本hgrep来替换命令grep|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5142626|#!/bin/bash

content=`cat`
echo+"$content"+%7C+head+-1
echo+"$content"+%7C+tail+-n%2B2+%7C+grep+"$@"|code-block|syntax|javascript|5142627|然后，df+-h+%7C+hgrep+tmpfs将输出包含tmpfs的报头和行|5142628|这句话很重要。|5142629|entityMap^0|8|5|I|4|0|0|3|J|R|5|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|P|$]]

I wrote a script <code>hgrep</code> to replace the command <code>grep</code>:
<pre><code>#!/bin/bash

content=`cat`
echo &quot;$content&quot; | head -1
echo &quot;$content&quot; | tail -n+2 | grep &quot;$@&quot;
</code></pre>
Then <code>df -h | hgrep tmpfs</code> will output header and lines include <code>tmpfs</code>
The quote is vital.

Is there a way to combine 'head -1' and 'grep' command into one for all the files in a directory and redirect the output to an output file. I can do this using 'sed' but it seems that it is not as fast as grep. 

<pre><code>sed -n '1p;/6330162/p' infile*.txt &gt; outfile.txt
</code></pre>

Using grep I can do the following one file at a time:

<pre><code>head -1 infile1.txt; grep -i '6330162' infile1.txt &gt; outfile.txt
</code></pre>

However, I need to do it for all files in the directory. Inserting a wildcard is not helping as it is printing headers first and then the grep output.

Include header in the 'grep' result

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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对于一个目录中的所有文件，有没有办法将'head -1‘和'grep’命令组合成一个命令，并将输出重定向到输出文件。我可以使用'sed‘来做这件事，但是它似乎没有grep那么快。sed -n '1p;/6330162/p' infile*.txt > outfile.txt使用grep，我可以一次执行以下一个文件：he...

问在“grep”结果中包括标头
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