Hey guys, guess this is in the right place(my apologies if not, i know how friendly everyone is here so i know i can hopefully get some good advice .
I'm starting my job soon in a big web hosting company. I'm no expert but i consider myself good with Linux. My brother is part of the dedicated support staff there and he's been singing my praises for months so i could work straight into dedicated support instead of going into vps support and working my way up, but I'm really nervous, even though i feel i can do well. I'm worried about letting my brother down after everything he has done for me. I was just looking to find out what sort of things would be mandatory to brush up on before i start? i would love to hear your input.

Thanks