92 lines
3.8 KiB
Groff
92 lines
3.8 KiB
Groff
.\"$Id: shadow.5,v 1.13 2005/03/24 06:24:36 kloczek Exp $
|
|
.\" Copyright 1989 - 1990, Julianne Frances Haugh
|
|
.\" 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 Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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.
|
|
.TH SHADOW 5
|
|
.SH NAME
|
|
shadow \- encrypted password file
|
|
.SH DESCRIPTION
|
|
\fIshadow\fR contains the encrypted password information for user's accounts
|
|
and optional the password aging information. Included is
|
|
.IP "" .5i
|
|
Login name
|
|
.IP "" .5i
|
|
Encrypted password
|
|
.IP "" .5i
|
|
Days since Jan 1, 1970 that password was last changed
|
|
.IP "" .5i
|
|
Days before password may be changed
|
|
.IP "" .5i
|
|
Days after which password must be changed
|
|
.IP "" .5i
|
|
Days before password is to expire that user is warned
|
|
.IP "" .5i
|
|
Days after password expires that account is disabled
|
|
.IP "" .5i
|
|
Days since Jan 1, 1970 that account is disabled
|
|
.IP "" .5i
|
|
A reserved field
|
|
.PP
|
|
The password field must be filled. The encryped password consists of 13 to
|
|
24 characters from the 64 characters alphabet a thru z, A thru Z, 0 thru 9,
|
|
\&\. and /. Optionally it can start with a "$" character. This means the
|
|
encrypted password was generated using another (not DES) algorithm. For
|
|
example if it starts with "$1$" it means the MD5-based algorithm was used.
|
|
.PP
|
|
Refer to \fBcrypt\fR(3) for details on how this string is interpreted.
|
|
.PP
|
|
The date of the last password change is given as the number of days since
|
|
Jan 1, 1970. The password may not be changed again until the proper number
|
|
of days have passed, and must be changed after the maximum number of days.
|
|
If the minimum number of days required is greater than the maximum number of
|
|
day allowed, this password may not be changed by the user.
|
|
.PP
|
|
An account is considered to be inactive and is disabled if the password is
|
|
not changed within the specified number of days after the password expires.
|
|
An account will also be disabled on the specified day regardless of other
|
|
password expiration information.
|
|
.PP
|
|
This information supercedes any password or password age information present
|
|
in \fI/etc/passwd\fR.
|
|
.PP
|
|
This file must not be readable by regular users if password security is to
|
|
be maintained.
|
|
.SH FILES
|
|
\fI/etc/passwd\fR \ - user account information
|
|
.br
|
|
\fI/etc/shadow\fR \ - encrypted user passwords
|
|
.SH SEE ALSO
|
|
.BR chage (1),
|
|
.BR login (1),
|
|
.BR passwd (1),
|
|
.BR su (1),
|
|
.BR passwd (5),
|
|
.BR pwconv (8),
|
|
.BR pwunconv (8),
|
|
.BR sulogin (8)
|
|
.SH AUTHOR
|
|
Julianne Frances Haugh (jockgrrl@ix.netcom.com)
|