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
