Change Proxmox Node IP address

To change the IP of one of your Proxmox nodes, you can start by clicking on the node whose IP you want to change, click on Network, and change the IP for vmbr0.

Next, SSH into this node and edit /etc/hosts with the following command:

nano /etc/hosts

Update to the IP to your desired IP.

Finally, reboot the node, and Bob's your uncle :)