Linguine with Shrimp Scampi

Name: Linguine with Shrimp Scampi
Ingredients: Vegetable oil; 1 tablespoon kosher salt plus 1 1/2 teaspoons; 3/4 pound linguine; 3 tablespoons unsalted butter; 2 1/2 tablespoons good olive oil; 1 1/2 tablespoons minced garlic (4 cloves); 1 pound large shrimp (about 16 shrimp), peeled and deveined; 1/4 teaspoon freshly ground black pepper; 1/3 cup chopped fresh parsley leaves; 1/2 lemon, zest grated; 1/4 cup freshly squeezed lemon juice (2 lemons); 1/4 lemon, thinly sliced in half-rounds; 1/8 teaspoon hot red pepper flakes