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It expects a server.jar, which is the vanilla server JAR, generally found on Mojang's version announcement blog posts, next to it, but will also generate a properties file on first launch where you can change the path. In the output directory, a fabric-server-launch.jar will be created. NOTE You need to enable snapshots in order to make the installer show mapping options for Minecraft snapshots. In the window you need to configure the mapping and loader version and the install location. Select the “Server” tab at the top of the window. Installer 0.4.0+ required! Download the Fabric installer from the Minecraft Server download page with the manual installation link below the download button or the Minecraft Launcher download page as if it was a client install.
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Older versions choose different techniques. You may get Java 16 from 3rd parties like AdoptOpenJDK or Azul Zulu. You can check your version with java -version. This is not included in most distributions. Note: Minecraft 1.17 requires Java 16, Minecraft 1.18 requires Java 17. It can be invoked in the same way and behaves similarly. With Minecraft specific server hosts, admin panels or start scripts the Fabric Launcher jar file can be used as a drop-in replacement for a vanilla server jar. Run the server with java -Xmx2G -jar nogui, the exact command is provided on the download website in step 1 Put the Fabric Server Launcher jar file into a directory of your choice, local or on a remote server Visit the Minecraft Server download page and configure the desired versions, then use the Executable Server (.jar) button to generate and download the Fabric Server Launcher jar file
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There is no explicit installation and the desired versions as selected on the homepage are already baked into this jar file. This launcher first downloads any missing Fabric Loader or Minecraft files, then continues with running the game server. The new server installation uses a single jar file as a launcher.
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