Is your  website running slow? Reducing the size of the images will speed it up and you will get higher ranking in Google and other search engines.

In this video, I show you how to speedup your website by compressing png images in CentOS using optipng. 

Commands:

• Install optipng:

yum install epel-release

yum install optipng

• To optimize all PNG pictures recursively In sub-folders cd to the parent folder

find -type f -name “*.png” -exec optipng -p {} \;

• To compress all PNG pictures in one folder: cd to the folder

optipng -p *.png

• To schedule the command in a cron job, put the path you want right after find:

find /home -type f -name “*.png” -exec optpng -p {} \;

Disclaimer: Use the above instructions at your own risk and always backup your images before performing any of these commands in case something goes wrong.