I have Ubuntu server 20.04.2 running on a VM on a Windows Server hypervisor. The only thing this VM is doing is running a Unifi controller. When I try to load the GUI of the controller, I get a 404 error. I tried to run apt-get update on the VM and I get write error - no space left on device. df -h yields:
I can tell from reading other questions on here that there's a problem, but being very new to Ubuntu, I'm not sure what the solution would be.