PiHole notes

Long been a Pihole user, running on a Raspberry Pi worked a treat.
Through a stupid mistake I lost access to the Pi :-(
Decided to move it to a Virtualbox VM running Ubuntu Server.
Install was painless, just follow the doc’s.

On the Pi I had used a hack to register names for hosts on our LAN.

On VM took the much easier approach.
PiHole reads /etc/hosts so just need to update that with all local hosts and then reload PiHole by running pihole restartdns reload.
The included help explains:

restartdns          Full restart Pi-hole subsystems
                      Add 'reload' to update the lists and flush the cache without restarting the DNS server
                      Add 'reload-lists' to only update the lists WITHOUT flushing the cache or restarting the DNS server