Name

utmpdump — dump UTMP and WTMP files in raw format

Synopsis

utmpdump [−frh] [filename]

DESCRIPTION

utmpdump is a simple program to dump UTMP and WTMP files in raw format, so they can be examined. utmpdump eads from stdin unless a filename is passed.

OPTIONS

−f, −−follow

Output appended data as the file grows.

−r, −−reverse

Undump, write back edited login information into utmp or wtmp files.

−h, −−help

Print a help text and exit.

−V, −−version

Output version information and exit.

NOTES

utmpdump can be useful in cases of corrupted utmp or wtmp entries. It can dump out utmp/wtmp to an ASCII file, then that file can be edited to remove bogus entries and reintegrated, using

utmpdump -r < ascii_file > wtmp

but be warned as utmpdump was written for debugging purpose only.

BUGS

You may not use the option −r as the format for the utmp/wtmp files strongly depends on the input format. This tool was not written for normal use but for debugging.

AUTHOR

Michael Krapp

SEE ALSO

last(1), w(1), who(1), utmp(5)

AVAILABILITY

The utmpdump command is part of the util-linux package and is available from Linux Kernel Archive


  -*- coding: UTF-8 -*-
Copyright (C) 2010 Michael Krapp

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  
GNU General Public License for more details.

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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA