Answers
Checking a password matches before logging in
Letting a user read a file but not edit it
Stopping students from installing programs
Asking for a username and password
Rejecting a login after a wrong password
Warning a user whose quota is full
Each user seeing only their own files
Storing passwords in encrypted form
Setting a disk quota of 2 GB per pupil
Limiting how much storage each person can use
Sharing limited storage space fairly between people
Changing a user's display name
Deleting a profile when someone leaves
Restricting a drive to certain staff only
Adding a new person who joins the school