In a large pot of salted boiling water, add the linguine or spaghetti. Cook according to package instructions until al dente. Drain and set aside, reserving about 1/2 cup of the pasta water.
In a large skillet over medium heat, melt the butter and olive oil together. Add the minced garlic and cook for about 30 seconds, until fragrant.
Add the shrimp to the skillet, seasoning with salt, pepper, and red pepper flakes. Cook for 2-3 minutes on one side until pink, then flip the shrimp and add the lemon zest and lemon juice.
Add the drained pasta to the skillet with the shrimp and toss to combine. If the mixture seems dry, gradually stir in some reserved pasta water until you reach your desired consistency.
Stir in the chopped parsley and remove from heat. Serve immediately with lemon wedges on the side for extra zest.
Notes
Adjust red pepper flakes to taste for desired spiciness.