Systems Programming Reference Material
Google
Unix man pages
Microsoft Products (free via
http://msdn07.e-academy.com/ksu_cs/
)
Shells
Bourne Again Shell (bash)
Working more productively with bash 2.x
TC Shell (tcsh)
Korn Shell
Thread Tutorials
Pthreads Tutorial 1
Pthreads Tutorial 2
Paul A. Farrell