LOGIN(1) LOGIN(1)
NAME
login - sign on
SYNOPSIS
login [ username ]
DESCRIPTION
The login command is used when a user initially signs on,
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 pass-
word, 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 mes-
sage-of-the-day files. Login initializes the user and
group IDs and the working directory, then executes a com-
mand interpreter (usually sh(1)) according to specifica-
tions found in a password file. Argument 0 of the command
interpreter is `-sh.
Login is recognized by sh(1) and executed directly (with-
out forking).
FILES
/etc/utmp accounting
/usr/adm/wtmp accounting
/usr/mail/* mail
/etc/motd message-of-the-day
/etc/passwd password file
SEE ALSO
init(8), newgrp(1), getty(8), mail(1), passwd(1),
passwd(5)
DIAGNOSTICS
`Login incorrect,' if the name or the password is bad.
`No Shell', `cannot open password file', `no directory':
consult a programming counselor.
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