How to set the Database Host Name during Oracle enterprise manager installation

Question

I'm trying to install Oracle Database for the first time and I'm facing many problem. I, following this guide , but I can't understand what should I set in the form shown in section 14. What is the database hostname? How I determine it?

Answer 1

It is described right above the section 14's screenshot:

The host name must resolve to the local host or virtual host because the host name is used for the local Oracle WebLogic Server as well as the Oracle Management Service. Do not provide a remote host or a load balancer virtual host in this field. Do not enter an IP address. Do not use underscores in the name. Short names are allowed, but you will see a warning, so Oracle recommends that you enter a fully qualified domain name instead.