NAME
login - sign onto UNIX
SYNOPSIS
login [ username ]
DESCRIPTION
The login command is used when a user initially signs onto
UNIX, or it may be used at any time to change from one user
to another. The latter case is the one summarized above and
described here. See `How to Get Started' for how to dial up
initially.
If login is invoked without an argument, it asks for a user
name, and, if appropriate, a password. Echoing is turned
off (if possible) during the typing of the password, so it
will not appear on the written record of the session.
After a successful login, accounting files are updated and
the user is informed of the existence of .mail and message-
of-the-day files. Login initializes the user and group IDs
and the working directory, then executes a command inter-
preter (usually sh (I)) according to specifications found in
a password file.
Login is recognized by the Shell and executed directly
(without forking).
FILES
/etc/utmp accounting
/usr/adm/wtmp accounting
/etc/motd message-of-the-day
/etc/passwd password file
SEE ALSO
init (VIII), getty (VIII), mail (I), passwd (I), passwd (V)
DIAGNOSTICS
`login incorrect,' if the name or the password is bad. `No
Shell,', `cannot open password file,' `no directory': con-
sult a UNIX programming counselor.
BUGS
1