[Freedombox-discuss] rebooting system from ssh

[Nicholas Greensmith]

Sweet I get it now, thanks guys!


Regards,

Nicholas Greensmith

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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Saturday, January 4, 2020 4:37 PM, Znoteer <znoteer at mailbox.org> wrote:

> Hi,
>
> On Sat, Jan 04, 2020 at 06:15:41AM +0000, Nicholas Greensmith via Freedombox-discuss wrote:
>
> > Thanks guys!
> > Out of curiosity though what's the reason behind command not found when
> > called without sudo? I would have expected 'permission denied'.
>
> It's because of the PATH environment variable. $PATH is different for
> ordinary users with regard to the root user. When you type a command name
> without its full path, the system uses $PATH to find the command. The full
> path for the shutdown command is "/sbin/shutdown". reboot is also in the
> /sbin directory.
>
> Try "echo $PATH" as both root and as an ordinary user:
>
> $ echo $PATH
> /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
>
> The ordinary user's PATH contains the following directories
> /usr/local/bin
> /usr/bin
> /bin
> /usr/local/games and
> /usr/games
>
> There's no /sbin in the list. That's why you get command not found. The
> system can't find it because the system wasn't told to look in /sbin.
>
> Here's root's PATH value:
>
> $ sudo su -
> root at fbx:~# echo $PATH
> /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
>
> The second to last entry is /sbin, so the system know to look in that
> directory when looking for the command.
>
> I hope this was clear,
>
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Znoteer
> znoteer at mailbox.org