v7 man page for passwd

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 sufficiently 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)