TUHS: The evolution of Unix facilities and architecture (2017)
OpenBSD Handbook: OpenBSD for Linux Users
Drew DeVault: In praise of Plan 9
OS für Atari ST und Amiga
EmuTOS is a Free operating system for computers based on Motorola 680x0 or ColdFire microprocessors. It features functionality similar to TOS, which powered the Atari ST and its successors between 1985 and 1994.
It is actively developed and supported.
The Server Room Show: Episode 76 – 77 – 78: Oberon, Plan 9 and Inferno
YouTube: The History of Unix, Rob Pike
Opensource.com: OpenWrt, an open source alternative to firmware for home routers
Schlechte Beurteilung für Ubuntu 22.04 LTS von DistroWatch
DistroWatch: Ubuntu 22.04 LTS
”I think the launch of Ubuntu 22.04 is a clear sign Canonical is much more interested in publishing releases on a set schedule than producing something worthwhile. This version was not ready for release and it is probably going to be a costly endeavour to maintain this collection of mixed versioned software and mixed display server and mixed designs for a full five years. It's a platform I would recommend avoiding.”