How to set up OTRS on Ubuntu

First, little info about OTRS taken from Wikipedia:
OTRS, an initialism for Open-source Ticket Request System, is a free and open-source trouble ticket system software package that a company, organization, or other entity can use to assign tickets to incoming queries and track further communications about them. It is a means of managing incoming inquiries, complaints, support requests, defect reports, and other communications. http://en.wikipedia.org/wiki/OTRS

So my interest in OTRS started couple of months ago. We had been using a very outdated ticketing system in my workplace for years and were thinking of changing to a better one. So as I was working during the summer holidays, I had time to look for an alternative. Found OTRS, set it up on my test server, tested for a few weeks and then migrated it to our production environment. Now we’ve been using OTRS for a month. Works like a charm. Usually if something is not working right in OTRS, it’s only a misconfiguration and easily fixed with the web GUI. Now we were also able to replace an old Windows server with an Ubuntu server. Slowly migrating from Windows to Linux… 😉