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Top Forums UNIX for Dummies Questions & Answers need to fetch the ip address pertaining to the modified file Post 302241372 by wempy on Monday 29th of September 2008 07:37:02 AM
Old 09-29-2008
Code:
utmpdump /var/log/wtmp

will give you users,times,ipaddresses of logins
 

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UTMPDUMP(1)							   User Commands						       UTMPDUMP(1)

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 file- name 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. File formats The only binary version of the utmp(5) is standardised. Textual dumps may become incompatible in future. The version 2.28 was the last one that printed text output using ctime(3) timestamp format. Newer dumps use millisecond precision ISO-8601 timestamp format in UTC-0 timezone. Conversion from former timestamp format can be made to binary, although attempt to do so can lead the timestamps to drift amount of timezone offset. 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 <https://www.kernel.org/pub/linux/utils /util-linux/>. util-linux July 2014 UTMPDUMP(1)
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