[ Thanks to Andrew
Weber for this link. ]
“Using the expire option will allow the administrator
to lock down an account without destroying the data so that it may
be available for a short time. When people go on vacation, have an
extended break for some reason or may not be comng back, you can
use the expire option to lock down their account. You also may want
to close an account correctly. The Ubuntu Server like other Linux
Servers provides methods to make this happen.“Example:
sudo chage -E 2011-06-10 mike
“This option is valuable for temporary accounts as well.”