On Tue, 2025-04-29 at 13:46 -0400, Greg Wooledge wrote: > Level 0 is shutdown > Level 1 is single user > Level 2 is multi user > Level 3 is multi user with networking > Level 4 is not used > Level 5 is GUI > Level 6 is reboot
> Your list matches > < > https://en.wikipedia.org/wiki/Runlevel#Linux_Standard_Base_specification > > > which shows what LSB defines for runlevels, which I believe is > derived > from Red Hat. 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.