Re: System broken after full-upgrade: please help!
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On 08/10/2014 02:45 AM, Bonno Bloksma wrote:
> Wanderer: While using Wheezy starting to use poweroff is the proper
> way to migrate from halt. But I do agree, it might have been a good
> idea to communicate this in a better way.
That's Debian-specific, though. halt and poweroff (and systemd) are not
only Debian.
> Charlie: According to the man pages all 3, halt, poweroff and reboot,
> use the shutdown command to perform the necessary steps when not
> starting in runlevel 0 or 6, which is pretty much always. So it is
> really weird that in your case poweroff does not work but shutdown
> does.
>
> ----<quote>-----
> If halt or reboot is called when the system is not in runlevel 0
> or 6, in other words when it's running normally, shutdown will be
> invoked instead (with the -h or -r flag). For more info see the
> shutdown(8) manpage.
That's weird, and if it represents a change made by systemd, possibly
unfortunate. I know of at least one somewhat degenerate, but broadly
distributed and not uncommonly used, environment (which I think may be
based on SuSE) where 'shutdown' does not work at all - exits with an
error when called - but 'halt' and 'reboot' do work. (And probably so
does 'poweroff'.)
Unless that environment is in fact running in one of those two
runlevels, which I'll admit is not impossible (though I suspect it's
using its own homegrown init system), that would seem to imply that
those commands are not invoking 'shutdown'...
- --
The Wanderer
Secrecy is the beginning of tyranny.
A government exists to serve its citizens, not to control them.
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