At the risk of taking another spear from pando today, let me offer this observation:

You claim to be a certified Oracle DBA and have no idea about other computer skills you need? How did you become certified? Brain dump or cheat sheet? Did you really learn anything? Chapter 1 of most DBA books talk about the day to day duties/activities of a DBA. Didn't the exam questions give you a hint about needing to know something about UNIX? Or NT?

You're certified. Good for you. Now go do some reading on your own (books, other Oracle-related web sites, Oracle magazine, etc.) and learn something about what a decent Oracle DBA would know when interviewing for a job. For example, do you need to be a UNIX sys admin? No, but you surely need to have quite a few of those skills (set up accounts, change environment variables, change permissions, how to install software, how to write a shell script, how to navigate the UFS, etc.).