Heat a large pot of water over high heat. Generously salt the water. Bring to a boil and cook linguine according to package instructions. Drain.
While pasta is cooking, heat a large skillet over medium-low heat. Add butter and olive oil. Add garlic and saute for 1 minute, stirring often (garlic burns easily to watch carefully). Add the shrimp and saute until the shrimp turn pink, about 5 minutes. Don't overcook the shrimp as they can become rubbery.
Remove from heat and add salt, pepper, parsley, lemon juice, lemon zest, and red pepper flakes. Toss to combine.
Toss shrimp and sauce with linguine. Drizzle with extra melted butter and extra-virgin olive oil, if so desired.
Notes
*Recipe adapted from Ina Garten's Shrimp Scampi with Linguine recipe