PASSWD(1)               GENIX Programmer's Manual               PASSWD(1)



      NAME
           passwd - change login password

      SYNOPSIS
           passwd [ name ]

      DESCRIPTION
           This command changes (or installs) a password  associated  with  the
           user name (your own name by default).

           The program prompts for the old password and then for the  new  one.
           The  caller must supply both.  The new password must be typed twice,
           to forestall mistakes.

           New passwords must be at least four characters long if  they  use  a
           sufficiently rich alphabet and at least six characters long if mono-
           case.  These rules are relaxed if you are insistent enough.

           Only the owner of the name or the super-user may change a  password;
           the owner must prove he knows the old password.

      FILES
           /etc/passwd

      SEE ALSO
           login(1), passwd(5), crypt(3)
           Robert Morris and Ken Thompson, UNIX password security

      BUGS
           The password file information should be kept  in  a  different  data
           structure  allowing  indexed  access; dbm(3) would probably be suit-
           able.























      Printed 11/16/83                                                        1