Season ribeye very generously with salt, as professional chefs say, make salt snow over ribeye. Season to taste with pepper. Let the ribeye rest for at least an hour.
Preheat cast iron skillet to the point where it's almost smoking. Drizzle skillet with a little bit of oil. Place seasoned ribeye onto the preheated skillet, let it cook for about 30 second and move to prevent sticking. Now let the ribeye cook for a few minutes on each side. Look for temperature guide above.
Let ribeye rest before serving, otherwise all the juices will run out and you will end up with a dry steak.