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Top Forums UNIX for Dummies Questions & Answers How to compare two columns in two files? Post 302968744 by PRAMOD 96 on Monday 14th of March 2016 06:14:28 AM
Old 03-14-2016
Yes I want to replace 3 fields of file a.dat(7th,8th and 9th) which will be empty initially.
Can you please explain the code for this scenario ?
 

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ARPSNMP(8)						      System Manager's Manual							ARPSNMP(8)

NAME
arpsnmp - keep track of ethernet/ip address pairings SYNOPSIS
arpsnmp [ -d ] [ -f datafile ] file [ ... ] DESCRIPTION
Arpsnmp keeps track for ethernet/ip address pairings. It syslogs activity and reports certain changes via email. Arpsnmp reads information from a file (usually generated by snmpwalk(1)). The -d flag is used enable debugging. This also inhibits mailing the reports. Instead, they are sent to stderr. The -f flag is used to set the ethernet/ip address database filename. The default is arp.dat. Note that an empty arp.dat file must be created before the first time you run arpsnmp. REPORT MESSAGES
(See the arpwatch(8) man page for details on the report messages generated by arpsnmp(8).) FILES
/usr/operator/arpwatch - default directory arp.dat - ethernet/ip address database ethercodes.dat - vendor ethernet block list SEE ALSO
arpwatch(8), snmpwalk(1), arp(8) AUTHORS
Craig Leres of the Lawrence Berkeley National Laboratory Network Research Group, University of California, Berkeley, CA. The current version is available via anonymous ftp: ftp://ftp.ee.lbl.gov/arpwatch.tar.gz BUGS
Please send bug reports to arpwatch@ee.lbl.gov. Attempts are made to suppress DECnet flip flops but they aren't always successful. 4th Berkeley Distribution 17 September 2000 ARPSNMP(8)
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