Cook the linguine according to package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the onion and garlic and sauté until softened, about 5 minutes.
Add the crushed tomatoes, red wine, tomato paste, dried oregano, crushed red pepper flakes, salt, and pepper. Bring to a simmer and cook for 10 minutes.
Add the calamari rings to the sauce and cook for an additional 5-7 minutes, until the calamari is cooked through and tender.
Add the cooked linguine to the skillet and toss to coat the pasta in the sauce.
Serve hot, garnished with fresh chopped parsley.