For complete reference of each program, please consult with program manuals. The following tutorials are generally designed to help users get started.
Unix, Linux, OS X: Unix for beginners (G.J. Kleywegt), Unix for beginners (I. Tickle), Unixhelp, Command Line Primer
Crystallography: Crystallography 101
Data Processing: MOSFLM and SCALA, SCALA, DENZO
Phasing: CCP4, SHARP (MAD), SHARP (SIRAS), SHELX-CDE
Refinement: CCP4, SHELXL
Model building: XFIT, O, COOT
