On Mon, 2020-06-15 at 01:32 +0200, Leon Fauster via CentOS wrote:
> Working with different OSs can be quite challenging (mentally :-)).
>
> I wonder why the command "halt" has not same result between EL6 and EL8.
>
> To shutdown the vm or workstation in EL8 i must use "shutdown now".
>
> Who mandates this behavior in terms of configuration file?
>
It's to do with systemd. EL6 used SysV based init and runlevels, EL7 &
EL8 use systemd targets.
If you look at the halt and shutdown commands they are symlinks to
/usr/bin/systemctl now and they are implemented as shims that replicate
the effect of the old SysV processes.
So the following have the same effect:
"systemctl isolate halt.target"
"halt"
"shutdown -H now"
"systemctl halt"
there are equivalents for "poweroff" and "reboot" as well.
P.
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