備註
如果用Java 8來做的話會有以下的錯誤，這時候就要確認一下所用的java版本
Failed to convert property value of type 'me.prettyprint.cassandra.service.clock.MicrosecondsClockResolution' to required type 'java.lang.String' for property 'clockResolution'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [me.prettyprint.cassandra.service.clock.MicrosecondsClockResolution] to required type [java.lang.String] for property 'clockResolution': no matching editors or conversion strategy found
參考資料：
http://usergrid.readthedocs.org/en/latest/deploy-local.html http://usergrid.incubator.apache.org/docs/deploy-local/
http://foorious.com/devops/usergrid/install-trusty/
http://foorious.com/devops/cassandra-cluster-trusty-install/
http://www.liquidweb.com/kb/how-to-install-cassandra-on-centos-7/
http://tecadmin.net/install-tomcat-8-on-centos-rhel-and-ubuntu/
https://www.digitalocean.com/community/tutorials/how-to-install-node-js-on-a-centos-7-server
