> I altered the line in /etc/apt/sources.list for main to say jammy-proposed (...) > ctdb since there was no corresponding update package
That was the issue, you only enabled proposed for main, and ctdb (and other packages) are in universe.
> I altered the line in /etc/apt/ sources. list for main to say jammy-proposed
(...)
> ctdb since there was no corresponding update package
That was the issue, you only enabled proposed for main, and ctdb (and other packages) are in universe.