root@min:/opt# /usr/bin/minetest --server --worldname test2
2022-08-09 11:24:16: [Main]: World 'test2' not available. Available worlds:
2022-08-09 11:24:16: [Main]: 	world		/root/.minetest/worlds/world
2022-08-09 11:24:16: [Main]: 	nowy_swiat		/root/.minetest/worlds/nowy_swiat
Multiple worlds are available.
Please select one using --worldname <name> or --world <path>
	world		/root/.minetest/worlds/world
	nowy_swiat		/root/.minetest/worlds/nowy_swiat
2022-08-09 11:24:16: ERROR[Main]: No world path specified or found.