• Login into server over SSH with ‘centos’ login.
• Switch to the root user by command:

   sudo bash

• Go to config directory of your website user:

  cd /home/promorri/conf/web

  (change ‘promorri’ to your user)

•  Open general config file with any text editor, for example:

  mcedit nginx.conf

•  Find section of your domain and in the end of the section you will see the line like this:

   include /home/promorri/conf/web/nginx.promo.com.conf*;

• Create additional config file regarding this line, for example:

  touch /home/promorri/conf/web/nginx.promo.com.conf_pagespeed.conf

• Open this file with text editor and add few lines:

  mcedit /home/promorri/conf/web/nginx.promo.com.conf_pagespeed.conf

location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
add_header "" "";
}
location ~ "^/ngx_pagespeed_static/" {
}
location ~ "^/ngx_pagespeed_beacon$" {
}

• When file will be create and lines added you must restart nginx service to apply new settings. To do this you should run command:

  service nginx restart

  Also before restarting service you can check config syntax by running this command:

  nginx -t

•  After all of this steps your domain should be optimized by pagespeed module.

Disabling pagespeed for domain.

• Login into server over SSH with ‘centos’ login.
• Switch to the root user by command:

  sudo bash

• Go to config directory of your website user:

   cd /home/promorri/conf/web

  (change ‘promorri’ to your user)

• Remove or move out from the folder addition config file which you created before. You can do this by running these commands (first command will move file to the /tmp directory and the second will delete it):

  mv nginx.promo.com.conf_pagespeed.conf /tmp
  rm nginx.promo.com.conf_pagespeed.conf

• Then you must restart ngixn service to apply new configuration. To do this you should run command:

  service nginx restart

  Also before restarting service you can check config syntax by running this command:

  nginx -t

PLEASE do not change anything in main nconfiguration file nginx.conf. Yum must work only with addition config files which you created.