Usage:
 utmpdump [options] [filename]

Dump UTMP and WTMP files in raw format.

Options:
 -f, --follow         output appended data as the file grows
 -r, --reverse        write back dumped data into utmp file
 -o, --output <file>  write to file instead of standard output
 -h, --help           display this help
 -V, --version        display version

For more details see utmpdump(1).