<p>In the third in the series, Dann introduces us to the <strong>tr</strong> command. 
</p>
<p>
Here's a flavour:<br />
<em>
The tr, or translate (aka: transliterate) command, substitutes one more characters for another set of characters or it will delete a specified set of characters.  The tr command takes input from standard in and writes to standard out.  This simple example of the tr command translates some numbers into a word:<br />
<br />
echo "12234" |tr '1234' 'aple'<br />
<br />
The output:<br />
<br />
apple<br />
</em>
</p>
<p>
The entire article, including links to the videos can be found on his site:<br />
<a href="https://www.linuxintheshell.com/2012/03/15/episode-002-tr/">https://www.linuxintheshell.com/2012/03/15/episode-002-tr/</a>
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