NAME
utmpdump - dump UTMP and WTMP files in raw formatSYNOPSIS
utmpdump [options] filenameDESCRIPTION
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, --followOutput appended data as the file grows.
Write command output to file instead of
standard output.
Undump, write back edited login information
into the utmp or wtmp files.
Display help text and exit.
Print version 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:File formats
Only the binary version of the utmp(5) is standardised. Textual dumps may become incompatible in future.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.AUTHORS
Michael KrappSEE ALSO
last(1), w(1), who(1), utmp(5)REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.AVAILABILITY
The utmpdump command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.2022-05-11 | util-linux 2.38.1 |