General Info
	spr && hpb
	structure of the course
	quizes
	case studies
		2 
		one proposed by each of us
	grading

Course goals

Security

S-bit
	how can we use to print
	cd /usr/bin	
	ls -lrt | grep 'r-s'
	why passwd

	s-bit

User ID 0
	can a system work with out a super user?
	how about creating a new user account?