Re: Why can ubuntu dist upgrade dist from within an X session?
On Sun, 2013-05-19 at 17:51 +0200, Ralf Mardorf wrote:
> On Sun, 2013-05-19 at 18:11 +0300, Πρεκατές Αλέξανδρος wrote:
> > In release notes it says:
> >
> > "You should not upgrade using telnet, rlogin, rsh, or from an X session
> > managed by xdm, gdm or kdm etc. on the machine you are upgrading. That is
> > because each of those services may well be terminated during the upgrade,
> > which can result in an inaccessible system that is only half-upgraded. Use of
> > the GNOME application update-manager is strongly discouraged for upgrades to
> > new releases, as this tool relies on the desktop session remaining active. "|
> >
> > So i wonder why can ubuntu dist upgrade dist from within an X session?
>
> I don't know what's different, but in general you for example can't
> backup a complete Linux, while it's running, a way to do it anyway, is
> to make a snapshot first and to backup the snapshot, independent from
> the system. In general you need to reboot to switch to a new kernel, but
> there's a tool that enables to switch the kernel without the need to
> restart the computer. IOW, they perhaps have programmed something to
> enable this and FWIW, it might be related or not, they don't use
Oops, Ubuntu does use upstart ;), a typo.
> upstart, so a basic component for the startup process already is
> completely different to Debian. Perhaps files for services such as
> display managers will be stored temporary and copied to the correct
> location during a startup and again, upstart is a completely newer
> process for startup than Debian's init. How many distros nowadays stay
> with this kind of init? I suspect nearly every distro does use upstart
> or systemd. You can't compare something old-fashioned like Debian, with
> distros that are more modern, closer to upstream. OTOH something e.g.
> running in the RAM can be updated and there e.g. is no need to stop X to
> update a display manager for a regular backup. What's the source of your
> quotation?
>
> Regards,
> Ralf
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