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@command=`aws ec2 describe-instances --filters "Name=instance-state-na +me,Values=running" | grep PrivateDnsName | cut -d ":" -f2| cut -d '" +' -f2 | sort -u `;
ip-10-1-129-212.us-west-2.compute.internal ip-10-1-129-168.us-west-2.compute.internal ... ip-10-1-129-194.us-west-2.compute.internal ip-10-1-1-252.us-west-2.compute.internal ip-10-1-67-133.us-west-2.compute.internal