Brett Parker wrote:
You'll be wanting to learn about how debian packages work, mostly! It's worth reading the developers reference and nm guide from http://www.debian.org/devel/ to get a feel for it, the nm guide is probably going to be the most use to you at this stage.
Thanks, I need some bedtime reading anyway!
Basic idea would be to do: apt-get source postfix
Thanks for that and the other hints. I also just found a guide to doing almost exactly what I needed:
http://www.howtoforge.com/virtual_users_and_domains_with_postfix_debian_etch
.. which also helps.
That should give you a reasonable hint to how to do it, *always* test the packages before going in to production with them, though.
Assuming I have built alternative .deb file "postfix_2.3.8-2_i386.deb", and already have postfix 2.3.8 installed from the repos, I know that: dpkg -i postfix_2.3.8-2_i386.deb will install it.
But, if I need to roll back to the original version, how do I do that?
(Next jobs: learn about apt pinning to stop the file being updated, and how to create my own repo to keep the file at.)
Mark Rogers