Installing HTTP/2 on Ubuntu 16.04 with virtual hosts

Now that HTTP/2 is fairly stable and widely available, I decided to try and install and run it on this server. I'm currently running the Ubuntu 16.04.2 LTS with virtual hosts configured, so I can serve a number of sites beyond this one. All the sites this server hosts are also served securely using certificates from LetsEncrypt.

Clearing mod_pagespeed cache

I use mod_pagespeed on this server to help speed up asset delivery and force optimization best practices across all the sites I host.