Everyone has mentioned programming, but that's the not only kind of experience that helps. If you aren't familiar with Linux, start getting comfortable with it

Everyone has mentioned programming, but that's the not only kind of experience that helps. If you aren't familiar with Linux, start getting comfortable with it. I got my first internship with my only real qualification being that I knew my way around a shell. My tasks were mainly just running scripts on a regular basis, but it lead to getting experience in a lot of other areas.