I’ve added a new page to the switch2osm guide: “Manually building a tile server (20.04 LTS)”. At the same time, the old “with packages” instructions has been retired from the list as that depended on Ubuntu 14.04, which has now dropped into Extended Maintenance.

Ubuntu 20.04 (“Focal Fossa”) has now been released. There are actually very few changes from the 18.04 version - mostly just updated versions of software (including postgres 12). Following these instructions shouldn’t take more than a couple of hours for small areas - the longest period of the setup is waiting for the shapefiles used by the style to download.

As before, the page is designed to be “the least you need to do” to get a rendering server working to create tiles like the ones that you see at openstreetmap.org. If it still sounds a bit complicated, don’t forget that you can try things out with Docker very quickly - and that should work anywhere that Docker is supported.