Once you started vanilla server (don't forget to change EULA), install Forge and you are done.
If you get an error about 'There are already files at the target directory', click on the three dots to choose the current location of your Minecraft server (the video shows this). The vanilla server can be downloaded in its respective page. If you get an error about 'Downloading Minecraft server failed, invalid e-tag checksum.', you will need to install a vanilla Minecraft server and then run Forge installer.
Java -jar forge-x.xx.x-installer.jar -installServer If you're installing Forge on a headless server with no graphical interface, run the following command in the directory where you downloaded the jar installer (replace 'x.xx.x' with the correct version number for the installer you downloaded): Once downloaded, launch it and choose option 'Install server'. Firstly, you need the Forge installer, which can be downloaded from the official Forge download page.
