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Ubuntu DNS Resolve Failure Fix

It seems that Ubuntu DNS Cache seems to stop working. The following is one of the easier fixes. More to come...

Fix One

Check the folder /etc/netplan to see if there are more than one config file *.yaml
cd /etc/netplan
If there are more than one, remove the least relivant one and update the other.

Fix Two

Update DNS in /etc/systemd/resolved.conf
sudo nano /etc/systemd/resolved.conf
sudo ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf && sudo systemctl restart systemd-resolved