Linux Babe published a tutorial about setting up OpenStreetMap Tile Server on Ubuntu Linux 18.04 LTS.
How to Set Up OpenStreetMap Tile Server on Ubuntu 18.04
OpenStreetMap is an open-source and self-hosted alternative to Google Maps. Learn how to build your own OpenStreetMap tile server on Ubuntu 18.04.
How to Set Up OpenStreetMap Tile Server on Ubuntu 18.04