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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)