How to optimize and compress JPEG or PNG images in linux
Channel: LinuxHelp
Date: 10/03/2016

Steps to install jpegoptim and optipng in Linux is explained in this video. jpegoptim helps optimize JPEG files and OptiPNG helps to optimize PNG images. 
For more explanation on this video: https://www.linuxhelp.com/install-jpegoptim-optipng-linux/