On Mon, 28 Mar 2022 17:54:23 -0400 Chuck Zmudzinski <brchu...@netscape.net> wrote:
> On 3/28/22 5:35 PM, Ash Joubert wrote: > > On 29/03/2022 03:34, Chuck Zmudzinski wrote: > >> I am new to running the unstable sid distribution. Today I wanted > >> to upgrade it and when using the dist-upgrade option of apt-get (I > >> think that's equivalent to the full-upgrade option of apt), I got > >> this: > > [...]> The problem is with the section that lists the packages that > > will be > >> REMOVED. > > > > Yes, this is normal for sid. Unwanted removals are usually a sign > > that dependencies are in transition. All sid administrators should > > know how to recognise this situation and avoid unwanted removals. I > > use: > > > > apt-get -s -V -o Debug::pkgProblemResolver=yes dist-upgrade > > > > to simulate a dist-upgrade to see what is going on and then > > "apt-mark hold" to hold packages until I am satisfied that > > dist-upgrade can proceed without unwanted removals. I use the > > package web page, package tracker, and transition tracker > > <https://release.debian.org/transitions/> to help identify the > > cause. "apt-mark showhold" lists held packages, which can be unheld > > when the transition is complete. > > > > Kind regards, > > > > Thank you, Ash, for this tip as I learn how to manage package > dependencies on Sid. I also look at the package web page and package > trackers to see what might be wrong. I will continue to use stable > most of the time for ordinary work, and keep Sid up to date when I am > working on bug fixes. It looks like quite a few packages are > currently affected by the recent upgrade of Python to 3.10, including > Xen, Samba, and Libre Office. For Xen, it appears a binary-only > upload fixes it, and that was already done earlier today. > A couple of other remarks: aptitude uses a more sophisticated algorithm to decide upgrades. Some sets of upgrades require to be done in a specific order, and aptitude is better able to find such cases. Don't try it with several hundred packages though, it will take forever. For example, apt on my sid is currently leaving about 100 packages untouched, and aptitude upgraded 20 of them. It's never going to get everything, but it may just manage that one critical package that you absolutely must get upgraded. If you have plenty of time, you can try it by hand. It is possible to do this with any of the tools, but I'm most comfortable with Synaptic. I did once clear a logjam completely by patient use of Synaptic, every single withheld package could be upgraded if it was done in the right order, but this is extremely rare. Almost always, as has been said, there are dependency issues that order of upgrade does not affect. One other point: don't leave sid for too long without maintenance. I upgrade mine most days, but I'd recommend not leaving it longer than a couple of weeks when times are busy. Sid goes relatively quiet during the release freeze, when nothing new can be moved out to testing, but it gets fairly frantic just after the release. I would suggest upgrading at least once a week then. -- Joe
