wget https://dl-ssl.google.com/dl/linux/direct/mod-pagespeed-stable_current_x86_64.rpm
rpm -i --nodeps mod-pagespeed-stable_current_x86_64.rpm
vi /etc/httpd/conf/extra/httpd-includes.conf
Include /etc/httpd/conf.d/pagespeed.conf
vi /etc/httpd/conf/httpd.conf
# Include conf/extra/httpd-deflate.conf
service httpd restart
apachectl -t -D DUMP_MODULES | grep speed