man.postnix Miscellaneous man pages of Plan 9 related material

     PASSWD(1)                                               PASSWD(1)

     NAME
          passwd, netkey - change user password

     SYNOPSIS
          passwd

          netkey

     DESCRIPTION
          Passwd changes the invoker's Plan 9 password.  The program
          prompts for the old password and then for the new one.  The
          new password must be typed twice, to forestall mistakes.
          New passwords must be sufficiently hard to guess.  They may
          of any length greater than seven characters.

          Netkey uses the password to encrypt network challenges.  It
          is a substitute for a SecureNet box.

          These commands may be run only on a terminal, to avoid
          transmitting clear text passwords over the network.

     FILES
          /dev/key

     SOURCE
          /sys/src/cmd/auth/passwd.c
          /sys/src/cmd/auth/netkey.c

     SEE ALSO
          encrypt(2), cons(3), securenet(8)

          Robert Morris and Ken Thompson, ``UNIX Password Security,''
          AT&T Bell Laboratories Technical Journal Vol 63 (1984), pp.
          1649-1672

     Page 1                       Plan 9            (printed 10/30/25)