Am 14.07.2021 um 19:41 schrieb Tapani Tarvainen:
> On Wed, Jul 14, 2021 at 05:12:27PM +0100, Michael Tremer (michael.tremer(a)ipfire.org) wrote:
>
>> Does the -r switch in shutdown(8) actually work?
> Yes. It has worked in all Linux systems I've used for years
> (and several non-Linux Unix-based systems like HP-UX).
I also tried this on my IPFire test system before submitting the patch and can confirm that -r (and -F) work as expected :)
>
> In the past "shutdown -r now" and "reboot" differed, e.g., reboot
> didn't sync or run shutdown scripts (and thus shutdown was sometimes
> recommended as the "safe" or "clean" way to reboot), but nowadays
> they're identical apart from some different options (notably, reboot
> has the "-f" option for "dirty" reboot, but it's not default anymore).
> People generally use whichever they're used to.
>
> Today shutdown, reboot, halt and poweroff are all symlinks to
> systemctl in Debian and Ubuntu at least, but options and defaults
> differ depending on which name it is called with.
>
> E.g., Debian Buster:
>
> $ ls -l /sbin/{shutdown,reboot,halt,poweroff}
> lrwxrwxrwx 1 root root 14 Mar 18 21:59 /sbin/halt -> /bin/systemctl
> lrwxrwxrwx 1 root root 14 Mar 18 21:59 /sbin/poweroff -> /bin/systemctl
> lrwxrwxrwx 1 root root 14 Mar 18 21:59 /sbin/reboot -> /bin/systemctl
> lrwxrwxrwx 1 root root 14 Mar 18 21:59 /sbin/shutdown -> /bin/systemctl
> 	
Thanks for the detailed explanation!