You can check hostname by inspecting the content of /etc/hostname file using the command:
cat /etc/hostname
In order to change or set a CentOS 7 machine hostname, use the hostnamectl command as shown in the below command excerpt.
hostnamectl set-hostname your-new-hostname
Use the following command to restart networking on your server to ensure that changes persist on restart:
/etc/init.d/network restart
Now try to install cPanel.
