Losing ssh connection during apt upgrade

[Chris Green]

On Sat, Jan 30, 2021 at 12:46:00AM +1100, Karl Auer wrote:
> On Fri, 2021-01-29 at 13:25 +0000, Colin Law wrote:
> > On Fri, 29 Jan 2021 at 12:31, Karl Auer <kauer at biplane.com.au> wrote:
> > > On Fri, 2021-01-29 at 12:21 +0000, Colin Law wrote:
> > > > I have a remote system which is connected via wifi.  To upgrade
> > > > packages I use ssh and sudo apt upgrade && sudo apt full-upgrade
> > > > If the wifi drops out in the middle of the upgrade is there a
> > > > danger that the system will be trashed?
> > > 
> > > Not much, but you can reduce it to zero by using the "screen"
> > > utility.
> > 
> > Yes, thanks, I know about screen.  What I am interested in knowing,
> > though, is whether there is any significant likelihood of catastrophe
> > if I am not using it.
> 
> And I answered you - "not much". However, since you can make it zero
> (or at least, zero for the reasons you mentioned), why would you not?
> 
I've done 'do-release-upgrade' via ssh.  It does warn you that it's
possibly not a good idea but it also tells you that it sets up a
secondary ssh in case the first one dies for some reason.

Just doing upgrade and full-upgrade via ssh is pretty low risk I
think, if it falls over you just re-connect and carry on.  I find apt
is pretty bomb-proof and even suggests ways to mend things if they do
fall over for any reason.

-- 
Chris Green