参考: http://d.hatena.ne.jp/rx7/20100612/p1 全世界にあるregionのうちTOKYO(ap-northeast-1)しか使ってないのに、いちいちコマンドで--regionを指定するのは面倒だ。 $ ec2-describe-regions REGION eu-west-1 ec2.eu-west-1.amazonaws.com REGION sa-east-1 ec2.sa-east-1.amazonaws.com REGION us-east-1 ec2.us-east-1.amazonaws.com REGION ap-northeast-1 ec2.ap-northeast-1.amazonaws.com REGION us-west-2 ec2.us-west-2.amazonaws.com REGION us-west-1 ec2.us-w