93 lines
2.5 KiB
Groff
93 lines
2.5 KiB
Groff
.\"Generated by db2man.xsl. Don't modify this, modify the source.
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.de Sh \" Subsection
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.br
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.if t .Sp
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.ne 5
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.PP
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\fB\\$1\fR
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.PP
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..
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.de Sp \" Vertical space (when we can't use .PP)
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.if t .sp .5v
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.if n .sp
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..
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.de Ip \" List item
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.br
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.ie \\n(.$>=3 .ne \\$3
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.el .ne 3
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.IP "\\$1" \\$2
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..
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.TH "SHADOW" 5 "" "" ""
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.SH NAME
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shadow \- encrypted password file
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.SH "DESCRIPTION"
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.PP
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\fIshadow\fR contains the encrypted password information for user's accounts and optional the password aging information\&. Included is:
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.TP 3
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\(bu
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login name
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.TP
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\(bu
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encrypted password
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.TP
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\(bu
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days since Jan 1, 1970 that password was last changed
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.TP
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\(bu
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days before password may be changed
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.TP
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\(bu
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days after which password must be changed
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.TP
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\(bu
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days before password is to expire that user is warned
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.TP
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\(bu
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days after password expires that account is disabled
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.TP
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\(bu
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days since Jan 1, 1970 that account is disabled
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.TP
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\(bu
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a reserved field
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.LP
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.PP
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The password field must be filled\&. The encrypted 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\&.
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.PP
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Refer to \fBcrypt\fR(3) for details on how this string is interpreted\&.
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.PP
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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\&.
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.PP
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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\&.
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.PP
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This information supersedes any password or password age information present in \fI/etc/passwd\fR\&.
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.PP
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This file must not be readable by regular users if password security is to be maintained\&.
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.SH "FILES"
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.TP
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\fI/etc/passwd\fR
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user account information
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.TP
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\fI/etc/shadow\fR
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secure user account information
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.SH "SEE ALSO"
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.PP
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\fBchage\fR(1), \fBlogin\fR(1), \fBpasswd\fR(1), \fBsu\fR(1), \fBpasswd\fR(5), \fBpwconv\fR(8), \fBpwunconv\fR(8), \fBsulogin\fR(8)
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.SH "AUTHOR"
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.PP
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Julianne Frances Haugh (jockgrrl@ix\&.netcom\&.com)
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