Log in on Ubuntu Server, then type command below to Install squid : Continue reading
Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator. Varnish is focused exclusively on HTTP, unlike other proxy servers that often support FTP, SMTP and other network protocols.
Here , I will explain how to get varnish in front of apache2 or accelerate apache2 with varnish .