HPUX passwd[1]

 passwd(1)                                                         passwd(1)





 NAME
      passwd - change login password

 SYNOPSIS
      passwd [-f file] [name]

 DESCRIPTION
      passwd changes or installs a password associated with the login name.
      If name is omitted, passwd uses getlogin() to determine the invoking
      user's user name (see getlogin(3C)).  An alternate password file can
      be chosen with the -f option.  The user must have read and write
      permission for the file given with the -f option.  The default
      password file is /etc/passwd.

      Ordinary users can change only the password corresponding to their
      login name.

      passwd prompts ordinary users for their old password, if any.  It then
      prompts for the new password twice.  The first time the new password
      is entered passwd checks to see if the old password has ``aged''
      sufficiently.  If ``aging'' is insufficient, the new password is
      rejected and passwd terminates; see passwd(4).

      Assuming ``aging'' is sufficient, a check is made to ensure that the
      new password meets construction requirements.  When the new password
      is entered a second time, the two copies of the new password are
      compared.  If the two copies differ, passwd repeats the cycle of
      prompting for the new password, at most twice.

      Passwords must be constructed to meet the following requirements:

           o  Each password must have at least six characters.  Only the
              first eight characters are significant.

           o  Characters must be from the 7-bit USASCII character set;
              letters from the English alphabet.

           o  Each password must contain at least two alphabetic characters
              and at least one numeric or special character.  In this case,
              ``alphabetic'' means uppercase and lowercase letters.

           o  Each password must differ from the user's login name and any
              reverse or circular shift of that login name.  For comparison
              purposes, an uppercase letter and its corresponding lowercase
              equivalent are are treated as identical.

           o  New passwords must differ from the old one by at least three
              characters.  For comparison purposes, an uppercase letter and
              its corresponding lowercase equivalent are are treated as
              identical.




 Hewlett-Packard Company            - 1 -     HP-UX Release 9.0: August 1992






 passwd(1)                                                         passwd(1)





      A user whose effective user ID is zero is called a super-user; see
      id(1), and su(1).  Super-users can change any password; hence, passwd
      does not prompt super-users for the old password.  Super-users are not
      forced to comply with password aging and password construction
      requirements.  A super-user can create a null password by entering a
      carriage return in response to the prompt for a new password.

 EXTERNAL INFLUENCES
    International Code Set Support
      Characters from single-byte character code sets are supported in
      passwords.

 FILES
      /etc/passwd

 SEE ALSO
      id(1), login(1), su(1), crypt(3C), passwd(4).

 STANDARDS CONFORMANCE
      passwd: SVID2, XPG2


































 Hewlett-Packard Company            - 2 -     HP-UX Release 9.0: August 1992