Installing Mods
How to add Steam Workshop mods to your ARK: Survival Evolved server.
There's no dedicated Mods field in the panel, mods are set up through GameUserSettings.ini and a launch argument instead.
Find your mod IDs
Find the mod(s) you want on the Steam Workshop, the number at the end of the page's URL is its mod ID.
Stop your server
ARK rewrites GameUserSettings.ini on shutdown, so any changes made while it's still running will be overwritten. Stop your server before editing it.
Set ActiveMods
Using SFTP or the file manager, open ShooterGame/Saved/Config/LinuxServer/GameUserSettings.ini and add the following under [ServerSettings]:
ActiveMods=<ModID1>,<ModID2>List your mod IDs in the order you want them loaded, left to right, comma separated with no spaces.
Capitalisation matters
ActiveMods must be typed exactly as shown, ARK won't recognise it otherwise.
Enable auto-download
Add -automanagedmods to Additional Arguments in the "Startup" section, this makes the server automatically download and keep your mods updated from the Steam Workshop on every start, rather than you having to manage the files yourself.
Start your server
Start your server, the first boot after adding mods will take longer than usual while they download.
Verify Against Your Version
Mod loading behaviour can change between ARK updates. If something isn't working as expected, check the official ARK Community Wiki for the most current instructions.