To complement Henry’s post on installing Plex on a Ubuntu Desktop, I decided to install Plex on a Ubuntu Server. The major benefit for using a Ubuntu Server is that it requires less memory and the Plex web interface is powerful making it quite viable to manage it without a desktop interface. The install steps for Plex on Ubuntu is also extremely painless. My Plex server is installed on a KVM virtual machine and connects to its media to my FreeNAS via NFS.
Download Plex Server
While you could get the Plex Server from the Canonical repository, the app is extremely behind. Go to the Plex Ubuntu Download page to get the latest download.
In my case, the latest was version 0.98.
Install Plex Server
sudo dpkg -i plexmediaserver_0.9.8.17.282-c844f09_amd64.deb
My media is stored on an external NAS server and is accessed from there via NFS. To set up NFS on your server, check out my cheatsheet on Ubuntu FileSystems
Once you’ve installed the server and set up NFS, to connect to the web management interface, the site can be located at http://:32400/manage
This instructions worked for Ubuntu 13.10 for me. You can also use the same instructions for upgrades as well.
— updated based on feedback from a question in the Ubuntu One forum.