On the Mods page, open the mod’s row menu and choose Remove. The mod’s file is deleted from the server. The mod stops loading at the next start. A box lets you also remove the mods that only this mod brought in.
Remove a mod
- Open Mods, then the Installed tab.
- On the mod’s row, open More for (name).
- Choose Remove.
- A box titled “Remove (name)?” says “(file) is deleted from the server. Its settings stay in case it comes back.”
- Choose Remove.
Removing a mod keeps its settings in mod-settings.dat, so they are back if you install it again. The panel answers “Removed. Its settings stay in mod-settings.dat in case it comes back.” The change applies at the next start. If the server is running, use Restart at the top of the server page. It drops everyone who is on, so warn them first with Message everyone on the Players page.
The leftovers tick
A mod can bring other mods it needs. Those show under “Installed because another mod needs them”. If you remove a mod that brought some, the box has a tick: Also remove the (count) mods only it brought. Tick it to clean up, or leave it unticked to keep those mods. Only the mods that nothing else needs are counted.
Mods that need it
If other mods need the one you are removing, the box warns: “These need it and will not load without it: (names).” Removing it anyway can stop the server from starting. Remove or turn off those mods too, or keep the one they need.
Turn off instead
To keep the mod on the server but not use it, use the switch on the mod’s row, Turn (name) off, instead. It stays on the server and is skipped from the next start. You can turn it on again later. On a world that uses the mod, turning it off may also lose what it added, so save a copy first. Wube’s own mods (Space Age, Quality, Elevated rails, Recycler) cannot be removed, only turned off under Wube’s own. Space Age needs the other three, so turning one of them off turns Space Age off too.
Players
Players need exactly the same mods as the server. After a removal, a player who still has the mod cannot join until they match the server again. See mods mismatch on join.
If it does not work
- Remove is missing from the menu. The mod is one of Wube’s own, or your role may not allow deleting files. Use the switch under Wube’s own.
- The server will not start after a removal. Another mod needs the one you removed. Find it on the Mods page and install it again, or see a mod crashed the server.
More about the game: Factorio servers.
Sources: wiki.factorio.com: Multiplayer