Ubiquiti’s Motto: If It Ain’t Broke, Don’t Won’t Fix It

After my upgrade of my Ubuntu LTS 16.04 to 18.04, I discovered some things had broken, including the Unifi Controller used for my UAP-HD. Apparently, the entire /usr/lib/unifi directory disappeared (alongside with MongoDB)!

Rooting around the Internet turned this thread up… And accordingly, there is a work-around, with some “clean-up” work.

The “official” fix is relatively useless, but that is another shouting match argument with another idiot person for a different time…

Anyway, on to the fix!

NOTE

The “fix” offerred below is not really one – it does not restore your data, although you could conceivably do so if you got creative in restoring some data files before re-installing MongoDB version 3.4 as per below…