name
	alias - command to become another 'person'

synopsis
	alias [username[.] [command [args ...] ]]

description
	Alias with no arguments tells you who you are at the moment.

	With one argument, it will bestow upon you the id for that person,
	p r o v i d e d  that either (1) you are super-user, or (2) your
	uid is the same as his (e.g., sab and sab2), or (3) you provide the
	correct password when alias requests it.

	If you place a period at the end of the username, you will not change
	directories; otherwise you will. If the account has an auto-start and
	you are not super-user, the auto-start will come up for you. All other
	accounting that login does is ignored, however.

	If you give more than one argument, the rest of the line will be
	treated (to the best of alias' ability) as a command line to be
	interpreted in the aliased person and/or directory. Thus, if I am
	jsdy in my directory, the command
		alias bin cat s1/alias.c > mycopy.c
	will create in my directory, owned by me, a copy of bin's alias.c:
	always providing I can remember the password to bin.

	Alias is like login in many respects. However, it does no accounting,
	and one returns to one's own shell when one hits control-D. To logout
	completely from within alias, one must use logout or logoff.

files
	/etc/passwd

see also
	login, logout/logoff

author
	joe yao

diagnostics
	usually, 'sorry' with some explanation.

bugs
	report any to jsdy@SAI
