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45 lines
1.2 KiB
Groff
45 lines
1.2 KiB
Groff
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.TH PASSWD 1
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.SH NAME
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passwd, netkey \- change user password
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.SH SYNOPSIS
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.B passwd
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[
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.I username\fR[@\fPdomain\fR]\fP
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]
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.PP
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.B netkey
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.SH DESCRIPTION
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.I Passwd
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changes the invoker's Plan 9 password and/or APOP secret.
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The Plan 9 password is used to login to a terminal while
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the APOP secret is used for a number of external services:
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POP3, IMAP, and VPN access. The optional argument specifies
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the user name and authentication domain to use if different
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than the one associated with the machine
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.I passwd
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is run on.
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.PP
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The program first prompts for the old Plan 9 password in the specified
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domain to establish
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identity.
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It then prompts for changes to the password and the
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secret.
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New passwords and secrets must be typed twice, to forestall mistakes.
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New passwords must be sufficiently hard to guess.
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They may be of any length greater than seven characters.
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.PP
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.I Netkey
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prompts for a password to encrypt network challenges.
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It is a substitute for a SecureNet box.
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.SH SOURCE
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.B \*9/src/cmd/netkey.c
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.br
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.B \*9/src/cmd/auth/passwd.c
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.SH "SEE ALSO"
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.IR encrypt (3)
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.PP
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Robert Morris and Ken Thompson,
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``UNIX Password Security,''
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.I AT&T Bell Laboratories Technical Journal
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Vol 63 (1984), pp. 1649-1672
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