reading for next week:
	Brush up on C programming and using Unix
	editors: emacs, vi, pico on some systems
	basic unix cmds: ls, cd, rm, mv, cp

syscalls vs. libc functions: details

man program
some C/Unix background
syscalls vs. libc functions
unix commands
solutions to quiz

manual page sections
	"man 2 foo" will tell you if foo is a system call.