login man page on NeXTSTEP

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LOGIN(1)							      LOGIN(1)

NAME
       login - sign on

SYNOPSIS
       login [ -p ] [ 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 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.  The message of the day is  printed,
       as  is  the  time  of  his last login.  Both are suppressed if he has a
       “.hushlogin” file in his home directory; this is mostly	used  to  make
       life easier for non-human users, such as uucp.

       Login  initializes  the	user  and group IDs and the working directory,
       then executes a	command	 interpreter  (usually	csh(1))	 according  to
       specifications  found  in  a  password file.  Argument 0 of the command
       interpreter is the name of the command interpreter with a leading  dash
       (“-”).

       Login   also  modifies  the  environment	 environ(7)  with  information
       specifying home	directory,  command  interpreter,  terminal  type  (if
       available)  and	user  name.  The `-p' argument causes the remainder of
       the environment to be preserved, otherwise any previous environment  is
       discarded.

       If  the	file  /etc/nologin  exists,  login  prints its contents on the
       user's terminal and exits. This is used by shutdown(8)  to  stop	 users
       logging in when the system is about to go down.

       Login  is recognized by sh(1) and csh(1) and executed directly (without
       forking).

FILES
       /etc/utmp	  accounting
       /usr/adm/wtmp	  accounting
       /usr/spool/mail/*  mail
       /etc/motd	  message-of-the-day
       /etc/passwd	  password file
       /etc/nologin	  stops logins
       .hushlogin	  makes login quieter

SEE ALSO
       init(8),	  getty(8),   mail(1),	 passwd(1),   passwd(5),   environ(7),
       shutdown(8), rlogin(1c)

DIAGNOSTICS
       “Login incorrect,” if the name or the password is bad.
       “No  Shell”,  “cannot  open  password  file”, “no directory”: consult a
       programming counselor.

BUGS
       -h is used by telnetd(8C) and other servers to list the host from which
       the connection was received.

4th Berkeley Distribution	  May 8, 1986			      LOGIN(1)
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