You are wondering about your images size can flood your server disk space and doesn’t want to optimize one by one image.So, you can use JpegOptim and PngOptim tool now on CentOS & Ubuntu.

I. Prerequisites

You need to install following linux tool

1. JPEGOPTIM

Install JpegOptim with Centos

yum -y install https://extras.getpagespeed.com/release-latest.rpm
sudo yum update
sudo yum install -y jpegoptim

Install JpegOptim with Ubuntu

sudo apt-get update -y
sudo apt-get install -y jpegoptim

Install JpegOptim with HomeBrew

brew install jpegoptim

2. OPTIPNG

Install OptiPng with CentOS

sudo yum update
sudo yum install -y optipng

Install OptiPng with Ubuntu

sudo apt-get update -y
sudo apt-get install -y optipng

Install OptiPng with HomeBrew

brew install optipng

3. ImageMagic

Install ImageMagic with CentOS

yum install ImageMagick ImageMagick-devel ImageMagick-perl

Install ImageMagic with Ubuntu

NOT YET

Install ImageMagic with MacOSX Brew

brew install imagemagick

II. Optimize images

Run following command to optimize your images

cd WEBROOT
find . -iname '*.jpeg' -print0 |  xargs -0 -n 1 -P 6 jpegoptim --max=82 --all-progressive --strip-all --preserve --totals --force
find . -iname '*.jpg' -print0 |  xargs -0 -n 1 -P 6 jpegoptim --max=82 --all-progressive --strip-all --preserve --totals --force
find . -iname '*.png' -print0 | xargs -0 -n 1 -P 6 optipng -o7 -preserve

Run following command to resize your images width into 1500 for maximum

find . -iname '*.jpeg' -print0 | xargs -0 -n 1 -P 6 mogrify -format jpeg -flatten -resize 1500\>
find . -iname '*.png' -print0 | xargs -0 -n 1 -P 6 mogrify -format png -flatten -resize 1500\>
find . -iname '*.jpg' -print0 | xargs -0 -n 1 -P 6 mogrify -format jpg -flatten -resize 1500\>