1. Cook the linguine for 11 minutes in boiling, salted water.
2. Meanwhile, sauté the crushed garlic with the capers and olives in the olive oil. Add a few spoonfuls of the boiling pasta water, and then add the chopped parsley and some freshly ground pepper. Cook for a few minutes; remove from heat and add the tuna.
3. Drain the linguine and place in a serving dish. Add the well-heated sauce, mix well and serve.