blocks|key|297646|text|这就是echo所做的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|297647|echo+"Some+text+here."+>+myfile.txt|code-block|syntax|javascript|297648|entityMap^0|3|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

That's what <code>echo</code> does:

<pre><code>echo "Some text here." &gt; myfile.txt
</code></pre>

blocks|key|80502|text|听起来你在找一个Here+document|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|80503|cat+>+outfile.txt+<<EOF
>some+text
>to+save
>EOF|code-block|syntax|javascript|80504|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Here_document^0|8|D|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Sounds like you're looking for a <a href="http://en.wikipedia.org/wiki/Here_document" rel="noreferrer">Here document</a>

<pre><code>cat &gt; outfile.txt &lt;&lt;EOF
&gt;some text
&gt;to save
&gt;EOF
</code></pre>

blocks|key|80530|text|这是另一种方式-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|80531|cat+>+outfile.txt
>Enter+text
>to+save+press+ctrl-d|code-block|syntax|javascript|80532|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|$]]

Here's another way -

<pre><code>cat &gt; outfile.txt
&gt;Enter text
&gt;to save press ctrl-d
</code></pre>

blocks|key|297914|text|对于文本文件：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|297915|cat+>+output.txt+<<EOF
some+text
some+lines
EOF|code-block|syntax|javascript|297916|对于PHP文件：|297917|cat+>+test.php+<<PHP
<?php
echo+"Test";
echo+\$var;
?>
PHP|297918|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For text file:

<pre><code>cat &gt; output.txt &lt;&lt;EOF
some text
some lines
EOF
</code></pre>

For PHP file:

<pre><code>cat &gt; test.php &lt;&lt;PHP
&lt;?php
echo "Test";
echo \$var;
?&gt;
PHP
</code></pre>

blocks|key|297816|text|我使用以下代码将原始文本写入文件，以更新我的CPU设置。希望这能有所帮助！脚本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|297817|#!/bin/sh

cat+>+/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor+<<EOF
performance
EOF

cat+>+/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor+<<EOF
performance
EOF|code-block|syntax|javascript|297818|这会将文本"performance“写入上述脚本中提到的两个文件。此示例覆盖文件中的旧数据。|297819|此代码另存为文件(cpu_update.sh)，并使其可执行运行：|297820|chmod+%2Bx+cpu_update.sh|297821|在此之后，您可以使用以下命令运行脚本：|297822|./cpu_update.sh|297823|如果不想覆盖文件中的旧数据，请切换出|297824|cat+>+/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor+<<EOF|297825|使用|297826|cat+>>+/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor+<<EOF|297827|这会将您的文本附加到文件的末尾，而不会删除文件中已有的其他数据。|297828|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|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]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1A|8|@]|9|@]|A|$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]]|$1|Y|3|Z|5|6|7|1D|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|11|$]]

I use the following code to write raw text to files, to update my CPU-settings. Hope this helps out!
Script: 

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

cat &gt; /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor &lt;&lt;EOF
performance
EOF

cat &gt; /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor &lt;&lt;EOF
performance
EOF
</code></pre>

This writes the text "performance" to the two files mentioned in the script above. This example overwrite old data in files.

This code is saved as a file (cpu_update.sh) and to make it executable run: 

<pre><code>chmod +x cpu_update.sh
</code></pre>

After that, you can run the script with:

<pre><code>./cpu_update.sh
</code></pre>

IF you do not want to overwrite the old data in the file, switch out

<pre><code>cat &gt; /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor &lt;&lt;EOF
</code></pre>

with

<pre><code>cat &gt;&gt; /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor &lt;&lt;EOF
</code></pre>

This will append your text to the end of the file without removing what other data already is in the file.

blocks|key|80574|text|cat+>+filename.txt|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|80575|输入文本直到EOF保存文本使用:+ctrl%2Bd|unstyled|80576|如果要使用以下命令读取.txt文件|80577|cat+filename.txt|80578|有一件事.txt不是强制性的，它是供你参考的。|80579|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$B|C]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>cat &gt; filename.txt
</code></pre>

enter the text
until EOF
for save the text use : ctrl+d

if you want to read that .txt file use 

<pre><code>cat filename.txt
</code></pre>

and one thing .txt is not mandatory, its for your reference.

blocks|key|297856|text|你也可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|297857|user@host:+$+cat<<EOF+>+file.txt
$+>+1+line
$+>+other+line
$+>+n+line
$+>+EOF
user@host:+$+_|code-block|syntax|javascript|297858|我相信有很多方法可以使用它。|297859|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|$]]

You can do it like this too:

<pre><code>user@host: $ cat&lt;&lt;EOF &gt; file.txt
$ &gt; 1 line
$ &gt; other line
$ &gt; n line
$ &gt; EOF
user@host: $ _
</code></pre>

I believe there is a lot of ways to use it.

blocks|key|297897|text|使用cat将文本写入文件的另一种方法如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|297898|cat+>file.txt+<<<+Write+something+here|code-block|syntax|javascript|297899|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|$]]

Another way to write text to file using cat would be something like this

<pre><code>cat &gt;file.txt &lt;&lt;&lt; Write something here
</code></pre>

blocks|key|297876|text|使用cat实现简单的管道回显|type|unstyled|depth|inlineStyleRanges|entityRanges|data|297877|例如|297878|echo+write+something+to+file.txt+%7C+cat+>+file.txt|code-block|syntax|javascript|297879|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

simply pipeline echo with cat 

For example

<pre><code>echo write something to file.txt | cat &gt; file.txt
</code></pre>

blocks|key|80604|text|也可以在%7C之后使用cat来写入文件，例如，通过管道向猫提供数据流|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|80605|entityMap^0|4|1|9|3|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

<code>cat</code> can also be used following a <code>|</code> to write to a file, i.e. pipe feeds cat a stream of data

Is something like this:

<pre><code>cat "Some text here." &gt; myfile.txt
</code></pre>

Possible? Such that the contents of <code>myfile.txt</code> would now be overwritten to:

<pre><code>Some text here.
</code></pre>

This doesn't work for me, but also doesn't throw any errors.

Specifically interested in a <code>cat</code>-based solution (not vim/vi/emacs, etc.). All examples online show <code>cat</code> used in conjunction with file inputs, not raw text...

Can linux cat command be used for writing text to file?

是这样的：cat "Some text here." > myfile.txt有可能吗？这样，myfile.txt的内容现在将被覆盖为：Some text here.这对我不起作用，但也不会抛出任何错误。对cat-based解决方案(不是vim/vi/emacs等)特别感兴趣。所有在线示例都显示cat与文件输入结合使用，而不是原始文本...

问linux cat命令可以用于将文本写入文件吗？
EN

回答 10

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问linux cat命令可以用于将文本写入文件吗？EN

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问linux cat命令可以用于将文本写入文件吗？
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