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The OS must be prepared to host the Management Server using the following steps. These steps must be performed on each Management Server node. Log in to your OS as root. Check for a fully qualified hostname. hostname --fqdn This should return a fully qualified hostname such as "managament1.lab.example.org". If it does not, edit /etc/hosts so that it does. Make sure that the machine can reach the Internet. ping www.cloudstack.org Turn on NTP for time synchronization. NTP is required to synchronize the clocks of the servers in your cloud. Install NTP. On RHEL or CentOS: yum install ntp On Ubuntu: apt-get install openntpd Repeat all of these steps on every host where the Management Server will be installed.