LOGIN(I)                     3/15/72                     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


     If login is invoked without an argument, it will ask  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  mailbox and

     message-of-the-day files.

     Login is recognized  by  the  Shell  and  executed  directly

     (without forking).


     /tmp/utmp       accounting

     /usr/adm/wtmp   accounting

     mailbox         mail

     /etc/motd       message-of-the-day

     /etc/passwd     password file


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


     `login incorrect,' if the name or the password is bad.   `No

     Shell,',   `cannot  open  password  file,'  `no  directory':

     consult a UNIX programming counselor.


     If the first login is unsuccessful, it tends to  go  into  a

     state  where  it  won't accept a correct login.  Hit EOT and

     try again.