OS 10.1 - how to back up system and files?

[brachiator]

if you run the command "ditto" in the CLI, without any variables, (i.e., just "ditto") you get the following usage guide (this applies for all UNIX commands, the usage guide):

Usage: ditto [-v] [-V] [-arch archVal] [-bom bomFile] [-rsrcFork] src [ ... src] dst
-v print a line of output for each src copied
-V print a line of output for every file copied
-arch archVal fat files will be thinned to specified archVal
multiple -arch options can be specified
archVal should be one of "m68k", "i386", "hppa", "sparc", etc
-bom bomFile only files present in the specified bom are copied
-rsrc copy preserving resource forks