Installing mods is extremely simple.
Use your favorite extraction program such as 7-Zip or WinRar to extract the mod files from their respective download location.
As of 0.4.7, simply move the mod folder to the
directory in your Minetest folder.
Each mod should have its own folder within the default mod folder.
So for example:
You can also place mods in the worldmods directory inside every world directory. Example:
After installing the mod, start Minetest, go to the world's "Configure" menu, click "Enable All" then "Save".
If you installed the game from repository from your Linux dist, then you need to add the mods in: (~ = homefolder)
If you use RUN_IN_PLACE=1 (enabled) your mods folder is in your minetest base directory (the place the game is):