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LOGIN(I)                                                              LOGIN(I)

       login - sign onto UNIX

       login [ username ]

       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 exe-
       cutes a command interpreter (usually sh(I)) according to specifications
       found in a password file.

       Login  is  recognized by the Shell and executed directly (without fork-

       /etc/utmp      accounting
       /usr/adm/wtmp  accounting
       .mail          mail
       /etc/motd      message-of-the-day
       /etc/passwd    password file

       init(VIII), getty(VIII), mail(I), passwd(I), passwd(V)

       `Login incorrect.'  if the name or the password is bad.
       `No shell.', `No directory': consult a UNIX programming counselor.

                                    3/15/72                           LOGIN(I)