If you're adept enough to handle AppData, Applications library, or whatever linux has, just go to the resource packs page, open the resource pack folder, wiggle your mouse to the top of the window, click ".minecraft", then enter Config. and look for a config file; something like "ZSS" Or Zelda in general. Look for ceramic jars, secret rooms, and dungeons to change the generation-per-chunk chance.
If you're still confused, wiggle your mouse to the top of the window, click ".minecraft", then look for Config.
~From a Fantastic Voyage