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UTMPDUMP

Section: User Commands (1)
Updated: July 2014
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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.
-V, --version
Display version information and exit.
-h, --help
Display help text 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

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