On Sun, Aug 21, 2022 at 04:04:02PM +0200, john doe wrote: > On 8/20/2022 9:48 PM, John Boxall wrote: > > I created an upgrade script based on something I found a few years ago > > that indicated the steps to follow to upgrade from one version of Debian > > to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run > > this script at some point (I am still running Buster/10 on my systems), > > I thought I'd ask the Debian user brain trust to comment/critique the > > scripted steps. So here they are: > > > > > > ############### Start > > <snip> > > > (I don't even have this part started yet....didn't know I needed it the > > last time I ran it) > > # > > The lines for the security mirror has changed on Bullseye. > > <snip> > > > ############### End > > > > Thoughts/critique/criticism/flames/etc > > > > The script does not bail out on command failure, you might want to > takecare of that if you automate this process by way of a script. > That is all I can say on the cmds. > > If I may, for a fiew servers I would do it manually instead of blindly > using a bunch of commands. > > If you need to automate this process, you should familiorize yourself > with something like Ansible or in anycase a more robust solution. > > For upgrading Buster to Bullseye, I used: > > $ apt-get update > $ apt-get upgrade > $ apt-get full-upgrade > > > For better or worse, Debian let you upgrade or reinstall from scratch. > > -- > John Doe >
For more than one version - since Debian doesn't allow you to skip versions well - here is a process that may single step you through two or more versions.. Read the release notes :) apt-get update ; apt-get dist-upgrade [on old version]. [Just to make absolutely sure you're completely up to date.] apt-get autoremove [To remove any cruft.] Change /etc/apt/sources.list stanzas to the next version [buster->bullseye] apt-get update ; apt-get upgrade [Safe upgrade - resolve all errors.] Reboot. apt-get dist-upgrade [Reboot - check to see new kernel comes up, for example] apt-get autoremove You _will_ need to modify this if there are major changes between versions if there's a breakage / if sources list changes. apt-get is definitely recommended for this at the moment, I think, and it should really be a process you check over manually because there's a lot of scope for things to go wrong. Downgrades / backgrades are NOT supported - so it's worth stepping through in single steps and checking output, IMHO. All the very best, as ever, Andy Cater
