Re: How to hibernate from the command line without typing password

[Sjoerd Hardeman <sjoerd@lorentz.leidenuniv.nl>]

Celejar schreef:
> On Tue, 8 Dec 2009 11:02:11 +0000
> chombee <chombee@lavabit.com> wrote:
>
> > On Sun, Dec 06, 2009 at 02:10:38PM -0500, Celejar wrote:
> > > On Sun, 6 Dec 2009 14:57:21 +0000
> > > chombee <chombee@lavabit.com> wrote:
> > >
> > > ...
> > >
> > > > Gnome desktop. You can send a signal via dbus asking for the computer to
> > > > be hibernated with the following command:
> > > >
> > > >     dbus-send --session --dest=org.freedesktop.PowerManagement --type=method_call /org/freedesktop/PowerManagement org.freedesktop.PowerM    anagement.Hibernate
> > > ...
> > >
> > > > I also saved the command as an executable script called 'hibernate' so
> > > > that I can hibernate from the command line by just typing hibernate.
> > > I don't recall the earlier thread, but what's wrong with the
> > > 'hibernate' command from the 'acpi-support' package, or 's2disk' from
> > > the 'usswsusp' package?
> > I have acpi-support installed but don't seem to have a hibernate
> > command, could take a closer look at the package I guess. I also have
>
> Sorry, my mistake - it's in the package 'hibernate'.
>
> > usswsusp installed but I think the s2disk command must be run with sudo,
> > so you have to type your password.
>
> Of course it must be run as root - why would a linux system allow an
> arbitrary user the power to suspend the system!  If you want to avoid
> typing a password, then you need to configure sudo to allow your user
> to use that command without a password.  This is what Xfce, for
> example, recommends:
>
> <Quote>
>
> "I'm unable to shutdown or restart my computer when running Xfce.
>
> There are two way to fix this: sudo and hal/dbus. Default starting from
> version 4.4 is hal.
>
> ...
>
> As you can see above, the dbus method that you're using also requires a
> dbus policy + adding yourself to a specific group.
If the dbus is set up correctly (eg, you can use hibernate as a user 
using one of the guis) this should also work:
 'dbus-send --session --dest=org.freedesktop.PowerManagement 
--type=method_call /org/freedesktop/PowerManagement 
org.freedesktop.PowerManagement.Hibernate'

but of course 'sudo s2disk' is a lot less typing ;)

Sjoerd

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