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jpegoptim is an open source image optimizer for JPEG image format. 
<a href="https://github.com/tjko/jpegoptim">https://github.com/tjko/jpegoptim</a>
You can download latest version of from
<a href="https://www.kokkonen.net/tjko/projects.html">https://www.kokkonen.net/tjko/projects.html</a>
To install jpegoptim, run
<pre>
cd /usr/local/src/
wget https://www.kokkonen.net/tjko/src/jpegoptim-1.4.6.tar.gz
tar xvf jpegoptim-1.4.6.tar.gz
jpegoptim-1.4.6/
./configure
make
make install
</pre>

Install jpegoptim