passwd.1 (1204B)
1 .TH PASSWD 1 2 .SH NAME 3 passwd, netkey \- change user password 4 .SH SYNOPSIS 5 .B passwd 6 [ 7 .I username\fR[@\fPdomain\fR]\fP 8 ] 9 .PP 10 .B netkey 11 .SH DESCRIPTION 12 .I Passwd 13 changes the invoker's Plan 9 password and/or APOP secret. 14 The Plan 9 password is used to login to a terminal while 15 the APOP secret is used for a number of external services: 16 POP3, IMAP, and VPN access. The optional argument specifies 17 the user name and authentication domain to use if different 18 than the one associated with the machine 19 .I passwd 20 is run on. 21 .PP 22 The program first prompts for the old Plan 9 password in the specified 23 domain to establish 24 identity. 25 It then prompts for changes to the password and the 26 secret. 27 New passwords and secrets must be typed twice, to forestall mistakes. 28 New passwords must be sufficiently hard to guess. 29 They may be of any length greater than seven characters. 30 .PP 31 .I Netkey 32 prompts for a password to encrypt network challenges. 33 It is a substitute for a SecureNet box. 34 .SH SOURCE 35 .B \*9/src/cmd/netkey.c 36 .br 37 .B \*9/src/cmd/auth/passwd.c 38 .SH "SEE ALSO" 39 .MR encrypt (3) 40 .PP 41 Robert Morris and Ken Thompson, 42 ``UNIX Password Security,'' 43 .I AT&T Bell Laboratories Technical Journal 44 Vol 63 (1984), pp. 1649-1672