Shrimp Fra Diavolo with Linguine

Name: Shrimp Fra Diavolo with Linguine
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Italian
Ingredients: 1 pound dried linguine; Kosher salt ((to taste)); 4 tablespoons olive oil ((divided)); freshly ground black pepper ((to taste)); 2 pounds extra-large shrimp (21/25 count) ((peeled and deveined)); 1 large onion ((halved and thinly sliced)); 4 teaspoons minced garlic; ½ teaspoon dried oregano; ¼ teaspoon red pepper flakes ((or to taste)); 1 cup dry white wine; 1 can (28 ounces) diced tomatoes; ½ cup sliced or torn fresh basil leaves ((divided)); Freshly grated Parmesan ((to serve; optional))