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 < asciifile > 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)