Change hostname on Linux
To see current hostname settings, type
hostnamectl
Change hostname using hostnamectl command
hostnamectl set-hostname <newhostname>
hostnamectl set-hostname homelab1
Another method is to replace old hostname with new hostname in files /etc/hostname and /etc/hosts then reboot the machine.
sudo nano /etc/hostname
sudo nano /etc/hosts
sudo reboot
Reference:
Manpage hostnamectl
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