I want to use a set of custom DNS addresses, for all connection, without resorting to change configuration for each connection individually.
In the Network Manager I can change the preferred DNS setting on a per connection basis, but this would not be feasible for my purpose. I am intending to use the given DNS addresses system-wide: They need to be applied permanently, rather than until connected to a new network.
I am aware that I would have to address compatibility for other services such DHCP, and dnsmasq so they would not conflict with each other, but I do not know as to what I am required to do. Therefore I would like to ask for advice as to how to do this.
Linux Mint 18.3 x64 CINNAMON system.