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To install, run:

# fetch latest GeoIP database, updated monthly
wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
gunzip GeoIP.dat.gz
mv GeoIP.dat /usr/local/share/GeoIP/GeoIP.dat

perl Makefile.PL
make
make test
make install