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PASSWD(1)                   General Commands 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  suf-
       ficiently  rich  alphabet and at least six characters long if monocase.
       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, Password Security: A Case History



                                                                     PASSWD(1)