82 lines
2.3 KiB
Groff
82 lines
2.3 KiB
Groff
.\" Copyright (C) 2010 Michael Krapp
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.\"
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.\" This program is free software; you can redistribute it and/or modify
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.\" it under the terms of the GNU General Public License as published by
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.\" the Free Software Foundation; either version 2 of the License, or
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.\" (at your option) any later version.
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.\"
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.\" This program is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public License
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.\" along with this program; if not, write to the Free Software
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.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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.\"
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.TH UTMPDUMP 1 "July 2014" "util-linux" "User Commands"
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.SH NAME
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utmpdump \- dump UTMP and WTMP files in raw format
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.SH SYNOPSIS
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.BR utmpdump " [options]"
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.RI [ filename ]
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.SH DESCRIPTION
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.B utmpdump
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is a simple program to dump UTMP and WTMP files in raw format, so they
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can be examined.
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.B utmpdump
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reads from stdin unless a
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.I filename
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is passed.
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.SH OPTIONS
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.TP
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.BR \-f , " \-\-follow"
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Output appended data as the file grows.
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.TP
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.BR \-o , " \-\-output " \fIfile
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Write command output to \fIfile\fR instead of standard output.
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.TP
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.BR \-r , " \-\-reverse"
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Undump, write back edited login information into the utmp or wtmp files.
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.TP
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.BR \-V , " \-\-version"
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Display version information and exit.
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.TP
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.BR \-h , " \-\-help"
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Display help text and exit.
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.SH NOTES
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.B utmpdump
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can be useful in cases of corrupted utmp or wtmp entries. It can dump
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out utmp/wtmp to an ASCII file, which can then be edited to remove
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bogus entries, and reintegrated using:
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.PP
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.RS
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.B utmpdump -r < ascii_file > wtmp
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.RE
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.PP
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But be warned,
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.B utmpdump
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was written for debugging purposes only.
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.SH BUGS
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You may
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.B not
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use the
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.B \-r
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option, as the format for the utmp/wtmp files strongly depends on the input
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format. This tool was
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.B not
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written for normal use, but for debugging only.
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.SH AUTHOR
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Michael Krapp
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.SH "SEE ALSO"
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.BR last (1),
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.BR w (1),
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.BR who (1),
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.BR utmp (5)
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.SH AVAILABILITY
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The utmpdump command is part of the util-linux package and is available
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from
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.UR ftp://\:ftp.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
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Linux Kernel Archive
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.UE .
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