143 lines
4.0 KiB
Groff
143 lines
4.0 KiB
Groff
.\" $NetBSD: passwd.1,v 1.28 2006/03/07 01:52:09 hubertf Exp $
|
|
.\"
|
|
.\" Copyright (c) 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" from: @(#)passwd.1 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd February 25, 2005
|
|
.Dt PASSWD 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm passwd
|
|
.Nd modify a user's password
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Ar user
|
|
.Nm
|
|
.Oo Fl d Ar files | Fl l Oc
|
|
.Op Ar user
|
|
.Nm
|
|
.Oo Fl d Ar nis | Fl y Oc
|
|
.Op Ar user
|
|
.Nm
|
|
.Oo Fl d Ar krb5 | Fl k Oc
|
|
.Op Ar principal
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
changes the user's password.
|
|
First, the user is
|
|
prompted for their current password.
|
|
If the current password is correctly typed, a new password is
|
|
requested.
|
|
The new password must be entered twice to avoid typing errors.
|
|
.Pp
|
|
The new password should be at least six characters long and not
|
|
purely alphabetic.
|
|
Its total length must be less than
|
|
.Dv _PASSWORD_LEN
|
|
(currently 128 characters).
|
|
Numbers, upper case letters and meta characters
|
|
are encouraged.
|
|
.Pp
|
|
All options may not be available on all systems.
|
|
.Bl -tag -width flag
|
|
.It Fl d Ar database
|
|
This option specifies the password database that should be updated. The
|
|
following databases are supported:
|
|
.Bl -tag -width files
|
|
.It files
|
|
This specifies that the password change should be applied to the local
|
|
password file.
|
|
When changing only the local password,
|
|
.Nm
|
|
uses
|
|
.Xr pwd_mkdb 8
|
|
to update the password databases.
|
|
.It nis
|
|
This specifies that the password change should be applied to the NIS
|
|
password database.
|
|
The
|
|
.Xr rpc.yppasswdd 8
|
|
daemon should be running on the master NIS server.
|
|
.It krb5
|
|
This specifies that the user's Kerberos 5 password should be changed.
|
|
The host must be configured to use Kerberos.
|
|
See
|
|
.Xr krb5.conf 5 .
|
|
.El
|
|
.It Fl l
|
|
This is the equivalent of
|
|
.Fl d Ar files .
|
|
.It Fl y
|
|
This is the equivalent of
|
|
.Fl d Ar nis .
|
|
.It Fl k
|
|
This is the equivalent of
|
|
.Fl d Ar krb5 .
|
|
.El
|
|
.Pp
|
|
If a password database is not specified,
|
|
.Nm
|
|
will change the password database as determined by the
|
|
Pluggable Authentication Module
|
|
.Pq PAM
|
|
library.
|
|
.Pp
|
|
The type of cipher used to encrypt the password depends on the configuration
|
|
in
|
|
.Xr passwd.conf 5 .
|
|
It can be different for local and NIS passwords.
|
|
.Sh FILES
|
|
.Bl -tag -width /etc/master.passwd -compact
|
|
.It Pa /etc/master.passwd
|
|
The user database
|
|
.It Pa /etc/passwd
|
|
A Version 7 format password file
|
|
.It Pa /etc/passwd.XXXXXX
|
|
Temporary copy of the password file
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr chpass 1 ,
|
|
.Xr login 1 ,
|
|
.Xr pwhash 1 ,
|
|
.Xr passwd 5 ,
|
|
.Xr passwd.conf 5 ,
|
|
.Xr pam 8 ,
|
|
.Xr pwd_mkdb 8 ,
|
|
.Xr vipw 8
|
|
.Rs
|
|
.%A Robert Morris
|
|
.%A Ken Thompson
|
|
.%T "UNIX password security"
|
|
.Re
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
command appeared in
|
|
.At v6 .
|