1 .\" $NetBSD: passwd.1,v 1.27 2005/02/28 15:19:59 wiz Exp $
3 .\" Copyright (c) 1990, 1993
4 .\" The Regents of the University of California. All rights reserved.
6 .\" Redistribution and use in source and binary forms, with or without
7 .\" modification, are permitted provided that the following conditions
9 .\" 1. Redistributions of source code must retain the above copyright
10 .\" notice, this list of conditions and the following disclaimer.
11 .\" 2. Redistributions in binary form must reproduce the above copyright
12 .\" notice, this list of conditions and the following disclaimer in the
13 .\" documentation and/or other materials provided with the distribution.
14 .\" 3. Neither the name of the University nor the names of its contributors
15 .\" may be used to endorse or promote products derived from this software
16 .\" without specific prior written permission.
18 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 .\" from: @(#)passwd.1 8.1 (Berkeley) 6/6/93
37 .Nd modify a user's password
42 .Oo Fl d Ar files | Fl l Oc
45 .Oo Fl d Ar nis | Fl y Oc
48 .Oo Fl d Ar krb5 | Fl k Oc
52 changes the user's password.
54 prompted for their current password.
55 If the current password is correctly typed, a new password is
57 The new password must be entered twice to avoid typing errors.
59 The new password should be at least six characters long and not
61 Its total length must be less than
63 (currently 128 characters).
64 Numbers, upper case letters and meta characters
67 All options may not be available on all systems.
70 This option specifies the password database that should be updated. The
71 following databases are supported:
74 This specifies that the password change should be applied to the local
76 When changing only the local password,
80 to update the password databases.
82 This specifies that the password change should be applied to the NIS
86 daemon should be running on the master NIS server.
88 This specifies that the user's Kerberos 5 password should be changed.
89 The host must be configured to use Kerberos.
94 This is the equivalent of
97 This is the equivalent of
100 This is the equivalent of
104 If a password database is not specified,
106 will change the password database as determined by the
107 Pluggable Authentication Module
111 The type of cipher used to encrypt the password depends on the configuration
114 It can be different for local and NIS passwords.
116 .Bl -tag -width /etc/master.passwd -compact
117 .It Pa /etc/master.passwd
120 A Version 7 format password file
121 .It Pa /etc/passwd.XXXXXX
122 Temporary copy of the password file
136 .%T "UNIX password security"