On Tue, Apr 29, 2025 at 13:06:44 -0700, Van Snyder wrote: > IIRC, it was the same in Unix Version 7, which Kernighan — or was it > Johnson or Richie? — said was an improvement on all of its successors. > And in BSD and SunOS and Solaris.
<https://en.wikipedia.org/wiki/Runlevel#System_V_Releases_3_and_4> gives a different list of runlevels for System V. Pure BSD systems don't use runlevels at all. Solaris did, being a hybrid of SysV and BSD. On Tue, Apr 29, 2025 at 21:00:16 +0000, xuser wrote: > On older debians runlevel 2 had X11. That's correct. On Debian before systemd, runlevels 2 through 5 were all equivalent out of the box, and would run a Display Manager if one were installed and not disabled.