How do I update on Linux?

[TheDreadPirate]

You need to put "sudo" in front of the ss command so that it lists the PID as well.

Code:

chris@rat-trap:~$ ss -tulpn | grep 8096
tcp  LISTEN 0      512                                          *:8096            *:*     
   
chris@rat-trap:~$ sudo ss -tulpn | grep 8096
tcp  LISTEN 0      512                                          *:8096            *:*    users:(("jellyfin",pid=3641666,fd=504))

And then you need to kill the PID that is still running because it is preventing the new instance from starting.  Whatever is running now is not the new instance and you are still using the old data from the flatpak.