I first completed two phone interviews upon starting the process. First one seemed to be formalities about myself and some basic work history. Second phone interview was much more technical about working with Linux, some DNS, as well as what other applicable skills I had. Afterward, I was given a breakfix through the TrueAbility website. This is an automated system that gives you a set number of things to fix and the grades it automatically. HR people can view your recorded session in case there are scoring anomalies. These tests are designed to be hard so it's okay to only get a few things correct; it is used to see where you would best fit in. Finally, I made it to the in-person interviews. They are as difficult as others here are expressing. I interviewed at the Rackspace offices on three separate occasions spanning a couple of months. Each interview day consisted of at least two smaller interviews. In total, counting phone interviews and each individual interview from the blocks, I was interviewed by the company NINE times. (A sidenote: I took the job, but I was not offered a Linux Admin role. There was some turbulence with training and placement so I took another position instead. Regardless, I still got a job!)