it was so:
I haved instaled 1.4.5 version then starting command "./minetest" happed errors
WARNING: system-wide share not found at "/usr/local/share/minetest"
WARNING: system-wide share not found at "/home/gabriele/minetest/minetest/bin/../share/minetest"
WARNING: system-wide share found at "/home/gabriele/minetest/minetest/bin/.."
then trying this command "./minetest --disable-unittests"
WARNING: system-wide share not found at "/usr/local/share/minetest"
WARNING: system-wide share not found at "/home/gabriele/minetest/minetest/bin/../share/minetest"
WARNING: system-wide share found at "/home/gabriele/minetest/minetest/bin/.."
What i do bad?