Attempting to install Cpanel on a cloud server (cloud garage)
The following command in the manual was executed.

# cd/home
# wget http://layer1.cpanel.net/latest
# sh latest

However, the following error appears in the command on the last line, and installation fails.
I'm not sure why, but can you lend me some help?

Your hostname (***. Com) is invalid, and must be
set to a fully qualified domain name before installing cPanel.
A fully qualified domain name must contain two dots, and consists of two parts: the hostname and the domain name.
You can update your hostname by runninghostname your-hostname.example.com, then re-running the installer.