To specify the local server host name, go to the main menu item 2. Manage localhost - 1. Configure hostname.
Then, confirm the host name change and input the name Input hostname - for example: server1 (host name by default - localhost.localdomain):
After that, the system will be assigned with the new name:
Note: Any host name can be selected, you can input any variant: bx1, server10, mysite.com (domain name is also possible, if it is singular), etc.