If it is an internship, they most likely will not be at all concerned with your technical skills. They will understand that you are essentially a "rookie" and have some learning to do. What they will look for however is the intangible stuff, such as communication, team-work, writing skills, ability to adapt, etc.

The best thing you can do is go in and be relaxed. They are not going to ask you to detail out a router config or anything like that.

echo "//yourname" | sed s/your/my/