This makes a great small headless Plex server also, if you have the CasaOS container auto start and your Ubuntu user automatically log in.
I like this better than the Snap package install of Plex server because it's just as easy and the linux-server Docker container of Plex can be moved to other systems easily.
CasaOS Wiki = https://wiki.casaos.io/en/home and click get started, or just past in the following into Terminal.
wget qO https://get.casaos.io | sudo bash