Android emulator fails to start after an update

The problem: A week ago, after some update(not really sure which one), I faced a very frustrating issue: I could not start my android emulator(AVD) anymore. It failed with a not very informative error:

I say that it is…

Debian jessie failing update with insserv rejected the script header

Few days ago my Debian jessie package update(e.g. apt-get upgrade) start failing with following message:

I was able to fix the problem by using solution described at and Long story short: When I tried

I saw…