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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)