General:

• Notes
  
• Unix gcc (GNU)
  
• DOS bcc (Borland)
  

Links:

• GCC Home Page
  
• C Programming
  
• A First Course in Program Design using C
  
• Data Structures and Algorithms
  
• linuxprogramming.com/
  
• RedHat: An Introduction to C Development on Linux
  
• The Standard C Library for Linux, Part one: stdio.h: file functions
  
• The Standard C Library for Linux Part Two: character input/output
  
• linuxassembly.org/
  
• Linux ELF Programming