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Top Forums Shell Programming and Scripting Using grep and cut within awk Post 302369579 by Scrutinizer on Monday 9th of November 2009 04:59:42 AM
Old 11-09-2009
Sure:
If $3 does not exist (in other words: if the input originates from b.txt) then set the array A with key $2 to the value of $1. next means skip the next commands and re-enter the loop. The rest of the code gets executed when $3 contains a value, i.e. when the input originates from a.txt.
 

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GEOIPLOOKUP(1)						      General Commands Manual						    GEOIPLOOKUP(1)

NAME
geoiplookup - look up country using IP Address or hostname SYNOPSIS
geoiplookup [-d directory] [-f filename] [-v] <ipaddress|hostname> DESCRIPTION
geoiplookup uses the GeoIP library and database to find the Country that an IP address or hostname originates from. For example geoiplookup 80.60.233.195 will find the Country that 80.60.233.195 originates from, in the following format: NL, Netherlands OPTIONS
-f Specify a custom path to a single GeoIP datafile. -d Specify a custom directory containing GeoIP datafile(s). By default geoiplookup looks in /usr/local/share/GeoIP -v Lists the date and build number for the GeoIP datafile(s). AUTHOR
Written by T.J. Mather REPORTING BUGS
Report bugs to <support@maxmind.com> COPYRIGHT
Copyright (C) 2006 MaxMind LLC This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
geoipupdate(1), nslookup(1). 4th Berkeley Distribution 2 Jan 2007 GEOIPLOOKUP(1)
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