UTMPDUMP(1)                  System Administration                 UTMPDUMP(1)



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 <ftp://ftp.kernel.org/pub/linux/utils/util-
       linux/>.



util-linux                         July 2012                       UTMPDUMP(1)
