A Brief about mod_pagespeed ?

mod_pagespeed is basically an open-source module for Apache which does the task of optimizing the web-pages and its resources. Its an automated process and makes use of the filters for enhancment of web performance by re-writing the resources. Performance enhancement for Apache HTTP Server can easily be achieved using the module.
Multiple filters are included within this module that helps in optimizing JavaScript, HTML and CSS stylesheets. Moreover, even the images in the formats .jpeg and .png can be read by the filters. As a final result, users can find an improvement in the load time for webpages on a website.

How to install mod_pagespeed?

Step1 : Determine the Linux distros and the version on the server by using the following command:

uname -a

Step 2 : Download the latest version of mod_pagespeed from http://code.google.com/speed/page-speed/download.html

Lets consider a 64 bits CentOS Linux system for the procedure further

wget https://dl-ssl.google.com/dl/linux/direct/mod-pagespeed-beta_current_x86_64.rpm

Step 3 : Use the following command to install it:

rpm -i mod-pagespeed-*.rpm

Step 4 : Confirming the installed files :

rpm -ql mod-pagespeed-beta
/etc/cron.daily/mod-pagespeed
/etc/httpd/conf.d/pagespeed.conf
/usr/lib64/httpd/modules/mod_pagespeed.so
/var/www/mod_pagespeed/cache
/var/www/mod_pagespeed/files

Step 5 : You must now restart Apache using the below command

service httpd restart

How to Upgrade mod_pagespeed ?

Inorder to upgrade the mod_pagespeed module, you must first download the latest version and make use of the command “yum localinstall mod-pagespeed-*.rpm” for the purpose of installing http://code.google.com/speed/page-speed/download.html

Use the below commands to upgrade the package :

sudo yum update
sudo /etc/init.d/httpd restart

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