UTMPDUMP
Section: System Administration (1)
Updated: July 2012
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NAME
utmpdump - dump UTMP and WTMP files in raw format
SYNOPSIS
utmpdump [options]
[
filename]
DESCRIPTION
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.
OPTIONS
- -f, --follow
-
Output appended data as the file grows.
- -o, --output file
-
Write command output to file instead of standard output.
- -r, --reverse
-
Undump, write back edited login information into the utmp or wtmp files.
- -h, --help
-
Display help text and exit.
- -V, --version
-
Display 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, 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.
BUGS
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.
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
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- NOTES
-
- BUGS
-
- AUTHOR
-
- SEE ALSO
-
- AVAILABILITY
-