Trampoline are looking to hire a PFY! Working as part of our engineering team, you’ll be helping us grow our infrastructure and supporting a mixture of sales staff, executives and developers in their day-to-day operations. This is a junior-to-mid-level position that would be ideal for a graduate with 1-2 yrs experience who’s keen to learn quickly.

For more details and how to apply, check out http://www.trampolinesystems.com/jobs

The Debian package installation process (as described in the Debian policy) is fairly complicated, at least internally. During the process of building a Debian package for our software I often had to check the policy manual for the order the various maintainer scripts (e.g. postinst, prerm etc.) are called. To complicate things further, both the old and new scripts get called (at least during an upgrade). There are various “error-unwinds” (= rollbacks) and final error states. 

It struck me that a visual representation would make things a lot easier, so here’s one I knocked together in OmniGraffle, for future reference:

maintainer scripts call sequence