Update Hostname on CentOS 7/8

Display the Current Hostname

1. Enter one of the following commands

   $ hostname

   or

   $ hostnamectl

Change the Hostname

1. Edit /etc/hostname using nano or vi/vim text editor

   $ sudo vim /etc/hostname

2. Delete the old hostname and set the new hostname
3. Repeat the process with any instances of the old hostname in /etc/hosts

   $ sudo vim /etc/hosts

4. Reboot the system for the changes to take effect

Change the Hostname without Rebooting

1. Type the following to set the hostname

   $ sudo hostname new-hostname

   or

   $ sudo hostnamectl set-hostname new-hostname

2. Repeat the above steps to update /etc/hostname and /etc/hosts

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#centos #centos 8