How to 'do-release-upgrade' from 16.04 to 18.04 remotely using PuTTY?

[Dave Nelson]

It can indeed be done remotely, and I've done it many times myself.

The only possible hazard would be if your SSH session gets terminated 
during the upgrade and, for some reason, you are unable to log back in. 
But it has never happened to me. As a precaution (possibly unnecessary), 
you could do your SSH sessions from a Linux system. For instance you 
could install VirtualBox and set up a machine on it. It's not difficult 
to do.

HTH,
Dave

On 2019-04-06 15:32, Bo Berglund wrote:
> I have an Ubuntu Server 16.04.6 LTS. It is used as a web server,
> OpenVPN server and Subversion backup server.
> It is headless on Intel CPU (64 bit) hardware without both display and
> keyboard. I manage it entirely via PuTTY from my Windows7 PC.
> No graphical interface is installed on this server.
> 
> Now on logon via PuTTY it displays this:
> 
> New release '18.04.2 LTS' available.
> Run 'do-release-upgrade' to upgrade to it.
> 
> When I google this command I get to pages saying it cannot be done
> remotely via SSH, is this true?
> 
> Is there no way to upgrade the system to the next LTS version except
> by hooking up a keyboard and monitor to it (Only VGA video
> available....)???
> 
> 
> --
> Bo Berglund
> Developer in Sweden

-- 
With all best wishes,
Dave