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CentOS 7.0 - man page for utmpdump (centos section 1)

UTMPDUMP(1)					System Administration					  UTMPDUMP(1)

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 <ftp:// ftp.kernel.org/pub/linux/utils/util-linux/>. util-linux July 2012 UTMPDUMP(1)


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