Hello,
On Sat, May 13, 2023, 11:31 Pierre-Elliott Bécue <
peb@debian.org> wrote:
The only way to avoid that would be to first add stretch to your
sources.list, update, install debian-archive-keyring, and then add
buster to your sources.list.
By the way, this is the recommended approach, please don't try to upgrade from 8 directly to 10, this is not officially supported.
Do an upgrade to 9 first, then another one to 10, and also consider upgrading to 11, if possible, since the next stable release (12) will happen in a few months. Make sure you're following the official instructions to perform release upgrades as well.
In order to use the repositories for old releases (to upgrade to 9), you will need to use Freexian's repository [0] (which provides LTS and ELTS support), alternatively you can also point to the "archives" repositories [1].
When upgrading to 10 or 11, you should be good to use the regular repositories, this happens because releases 8 and 9 are not officially supported anymore (support being provided by Freexian instead).
Trying to generalize the support provided by Debian releases, it's mostly like this:
3 years of official support
+2 years of LTS support provided by Freexian (you need to use their repositories)
+5 years of ELTS support, also provided by Freexian (and so you need to use their repositories).
In total that's 10 years.
Note that LTS and ELTS support does not cover all packages (just as you would get with other enterprise distros).
Also note that Freexian's support, although not officially affiliated to Debian (as far as I know), it's done by Debian Developers. Their work is funded through customers/sponsors of Freexian and provided for free for everyone to use (so consider sponsoring it if you use it in a company, I think they can also provide direct support to you). Check their website for more info [3].
Disclaimer: I am not affiliated with Freexian.