It's not a font ... and it says LINMOB (for LINux on MOBile).
I drew it in GIMP ages ago (15 years maybe?); and did not have the time to come up with a new logo since. (I am not super happy with it myself - but it's not a priority, there's way more important stuff I don't have time for).
That said: Contributions welcome! (at https://framagit.org/linmob/linmob.frama.io)
It's pretty much "real". You can install every package in the repos via apt, and they should work. Caveats can apply with regards to stuff that needs extra adjustment for accelerated graphics or new kernel features.