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And one to do a DNS lookup test on google:
Code:

IFS=''
DNSHOST='www.google.com'
DIG=$( dig $DNSHOST )
RC=$?
if [ $RC -ne 0 ]; then
echo "DNS lookup ($DNSHOST) failed"
exit $RC
fi
RT=$( echo $DIG | grep "Query time" | cut -d' ' -f 4- )
echo "DNS lookup ($DNSHOST) $RT"
exit 0

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