Lets install Varnish :
Here we will consider the ubuntu as my OS is the same :P.
#sudo apt-get install varnish
It will show the dependency tree for the varnish so just install.
In this case you don't have to build the packages and configure like other *nix.
Using varnish Servers :
Varnish has a concept of "backend" or "origin" servers. A backend server is the server providing the content Varnish will accelerate.
The default configuration file located at :