NAME

passwd, typepasswd, netkey − change login password

SYNOPSIS

­passwd

­aux/typepasswd

­aux/netkey

DESCRIPTION

­Passwd changes your Plan 9 password.  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 five characters long and be sufficiently hard to guess; passwords are not limited to eight characters.  If the command is successful, the key in the encryption device is changed.  Since each name space group has a separate encryption device, keys in other name space groups are not updated.  For example, other windows will not have the new password.  To correct the problem, reboot or run ­typepasswd in the other windows. 

­Typepasswd changes the key in the user’s encryption device without changing the Plan 9 password. 

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

These commands should be run only on a terminal; otherwise the password will be transmitted over a network in clear text. 

FILES

­/dev/key

SEE ALSO

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

Robert Morris and Ken Thompson, ‘UNIX password security,’ ­AT&T Bell Laboratories Technical Journal 63 (1984) 1649-1672

Plan 9  —  January 03, 1993