by gandalfff on 11/28/22, 5:15 AM with 12 comments
by em500 on 11/28/22, 12:37 PM
by lproven on 11/28/22, 12:35 PM
There are really less than ½ dozen "Unix" OSes. 99% of them are variants on a theme.
#1
There's AT&T UNIX, including System V. That includes UnixWare, SCO OpenServer, Solaris and OpenSolarism and HP-UX .
Are any other SysV descendants still on sale?
#2
There's BSD.
That covers 4 FOSS BSDs I can think of offhand, plus AFAIK IBM AIX is derived from BSD. Anything else commercial?
#3
There's macOS. XNU is based on Mach. I can't think of any other current Mach derivatives. The HURD if you're generous.
#4
There's Linux, including Android and ChromeOS.
#5
There's QNX.
#6
There's Minix 3, which now mostly uses the NetBSD userland but has its own kernel.
Is that it?
Any other self-hosting, native on bare metal, Unix-like OSes?
I know a few things can emulate UNIX well enough to pass the Open Group tests if they cared to: IBM z/OS, OpenVMS. MS has 2: NT's POSIX environment, plus WSL1. But their native OS design is not Unix-like nor meant to be Unix-compatible.
Plan 9 isn't a UNIX although it is the one true direct offspring of UNIX. And Inferno is even less UNIX-like.
Serenity OS is not self-hosting and barely runs on bare metal.
HelenOS and Redox OS are only remotely superficially Unix-like.
Everything else is either dead, or historical and only runs in VMs or on emulators.
by badrabbit on 11/28/22, 11:10 AM
22. Unix History (levenez.com) 36 points by gandalfff 5 hours ago | flag | hide | 1 comment
What a coincidence
by pushedx on 11/28/22, 9:00 AM