I answered an ad placed by Rackspace's HR dept. on LinkedIn. After two initial screenings with very simple Linux related questions I had another interview over Skype. This was with three people of the department that had the job opening. After this interview I was invited to fly in to their offices in Hayes (near Heathrow airport). The face-to-face interview was in three parts: the first one with the technical people, they gave me a list of 9/10 tasks that were related to configuring Apache with PHP (on a CentOS server), sendmail, and other simple tasks, but there were "traps" involved, such as a file not being writable even though you were logged in as root user. The second technical part involved explaining how I would proceed in a scenario where a customer needed to face a raise of 400% in their website traffic. And the third part was with two of their team managers. They asked more questions related to the job as Support Engineer with customer oriented scenarios (What would you do if a customer calls, very angry, and you have 10 other critical incidents waiting, etc.).