43 lines
1.3 KiB
HTML
43 lines
1.3 KiB
HTML
|
---
|
|||
|
|
layout: page
|
|||
|
|
category_title: interm
|
|||
|
|
category-page: interm
|
|||
|
|
tags: tee shell command
|
|||
|
|
author: Nicola Brunner
|
|||
|
|
title: tee
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
<p>The <code>tee</code> command is used to split the output of a program, doing
|
|||
|
|
this the output can be displayed in the shell and in the same time written in a
|
|||
|
|
file. This is useful, for example, if we want to capture intermediate outputs of
|
|||
|
|
a long program.
|
|||
|
|
The command is named after the T-splitter used in plumbing, because they have
|
|||
|
|
similar functions.</p>
|
|||
|
|
<br>
|
|||
|
|
|
|||
|
|
<h3>Usage:</h3>
|
|||
|
|
<p>The default tee command syntax is:</p>
|
|||
|
|
|
|||
|
|
<pre>tee [flags] [file]</pre>
|
|||
|
|
|
|||
|
|
<p>Where <code>[flags]</code> are the tee flags (below you will find more info),
|
|||
|
|
and argument <code>[file]</code> is a file or a list of files, each of which
|
|||
|
|
receives the output.</p>
|
|||
|
|
|
|||
|
|
<h3>Flags:</h3>
|
|||
|
|
|
|||
|
|
<p>The most common flags of tee are:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><code>-a</code> Appends the output to each file, rather than overwriting it.</li>
|
|||
|
|
<li><code>-i</code> Ignores interrupt signals.</li>
|
|||
|
|
</ul>
|
|||
|
|
|
|||
|
|
<h3>Example:</h3>
|
|||
|
|
|
|||
|
|
<pre>date | tee example.txt</pre>
|
|||
|
|
|
|||
|
|
<p>Basically, with this example, we can see that tee writes the date in
|
|||
|
|
example.txt, but shows also the output (in this case the date) in the shell.
|
|||
|
|
If you wouldn’t your file be overwritten every time you use this command,
|
|||
|
|
you should use <code>-a</code> that appends the output to the file.</p>
|