UTMPDUMP(1) - man page online | user commands
Dump UTMP and WTMP files in raw format.
UTMPDUMP(1) User Commands UTMPDUMP(1)
NAMEutmpdump - dump UTMP and WTMP files in raw format
SYNOPSISutmpdump [options] [filename]
DESCRIPTIONutmpdump 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.
NOTESutmpdump 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 reinte‐ grated using: utmpdump -r < ascii_file > wtmp But be warned, utmpdump was written for debugging purposes only.
BUGSYou 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.
SEE ALSOlast(1), w(1), who(1), utmp(5)
util-linux July 2014 UTMPDUMP(1)
AVAILABILITYThe 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/⟩.
|This manual||Reference||Other manuals|
|utmpdump(1)||referred by||getutmp(3) | utmp(5)|
|refer to||elvi(1sr) | last(1) | utmp(5) | who(1)|