utmpdump — dump UTMP and WTMP files in raw format
utmpdump [options]
[filename]
utmpdump is
a simple program to dump UTMP and WTMP files in raw format,
so they can be examined. utmpdump reads from stdin
unless a filename is
passed.
−f,
−−followOutput appended data as the file grows.
−o,
−−output fileWrite command output to file instead of standard output.
−r,
−−reverseUndump, write back edited login information into the utmp or wtmp files.
−V,
−−versionDisplay version information and exit.
−h,
−−helpDisplay help text and exit.
utmpdump can be useful in cases of corrupted utmp or wtmp entries. It can dump out utmp/wtmp to an ASCII file, which can then be edited to remove bogus entries, and reintegrated using:
utmpdump -r < ascii_file > wtmp
But be warned, utmpdump was written for debugging purposes only.
You may not use the −r
option, 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 only.
The utmpdump command is part of the util-linux package and is available from Linux Kernel Archive
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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. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |