Thread: Learned the basics, SO ?

I want to learn advanced C like Network and Socket programming , Paralell Port programming , Kernel Programming...

Whoa! Slow down there slick. If you don't know where to use a struct then you're a long way from systems level programming. Syntax is easy. The hard part is putting the syntax together to make something useful. The good news is that there are books that cover intermediate and advanced C, and books that cover the topics you want in an understandable way. Off the top of my head, C FAQs by Steve Summit, anything about data structures and algorithms, Advanced C by Peter van der Linden, anything by W. Richard Stevens, anything by Donald Knuth, and C Unleashed should get you well on your way.

For network and socket programming, Beej's guide is free and really good. This looks promising for interfacing with the parallel port. I always just worked from documentation instead of tutorials and HOWTOs. For kernel programming--I assume you mean Linux--there are books that describe the kernel, the design of the kernel, annotate the kernel, and try to teach you how to hack it. I've glanced at them, but never really gotten into any of them. The best way to get into the kernel is the way I did it...by diving into the code and working your way to an understanding. But you need to be pretty darn good with C and have at least a remedial knowledge of assembly before you'll have a hope of following that mess.