Use this information when changing the hostname in centos 7.
Ways to show the hostname
# hostname # hostname -s # hostname -f # cat /etc/hostname # hostnamectl
How to change the 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
In order to apply the new hostname, a system reboot is required, issue one of the below commands in order to reboot a CentOS 7 machine.
# init 6 # systemctl reboot # shutdown -r now
A second method to setup a CentOS 7 machine hostname is to manually edit the /etc/hostname file
# nano /etc/hostname