I do know it is a long way to go to become DBA. That is also the reason I asked this kind of question. It's not enough really if you just know one product, whatever it is ORACLE or SQL SERVER. I just wonder how deep I should know UNIX or LINUX. Because I don't have any experience working under UNIX environment. Should I take some courses or just read some books? Or like most guy, I try to install LINUX at home and play with it, get some idea.

Thank you all