To change the hostname (computer name) on a Red Hat Enterprise Linux (RHEL) 8 system, you can use the hostnamectl command.
To set the hostname to a new value, use the set-hostname option followed by the new hostname. For example:
sudo hostnamectl set-hostname myhostname
This will set the hostname to myhostname.
To view the current hostname, you can use the status option:
hostnamectl status
This will display the current hostname, as well as other system information.
Note that the changes made using the hostnamectl command are temporary and will not persist after a reboot. To make the hostname change permanent, you will need to edit the /etc/hostname file and set the hostname in this file.
sudo vi /etc/hostname
Change the hostname in this file to the desired hostname and save the file. The changes will take effect after a reboot.