Pragmatic Answer (Score 1)

I get this question every other day.

If you want to get Unix/Linux understanding, buy this old book:
The UNIX Programming Environment, Brian W. Kernighan & Rob Pike, Pretence Hall Software Series, ISBN 0-13-937681-X.
Do NOT worry about the age ! Unix is old !

If you want a fast solution for a specific question, gimme an email.

If you want something inbetween, go here.

Good Hunting,
george./