Where is Plex installed in Linux?

2 Answers. On Ubuntu/Debian settings and library stored in /var/lib/plexmediaserver/… .

How do I know if Plex is running on Linux?

To update Plex to the newest version available on the repository, run the below apt-get command. Once installed the Plex service automatically starts running. You can check if its running by running the this command in a terminal. If the service is running properly you should see something like this.