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.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text 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/⟩.