Bring a large pot of well salted water to a boil over medium heat. Once boiling, drop the linguine and cook until the pasta is "al dente" maybe a minute or so less than the box directs. Reserving about 1/2 cup of pasta water, drain the pasta and set aside.
Heat olive oil in a pan. Add garlic and red pepper flakes. Once the garlic is fragrant, add clam juice, or chopped clams and white wine.
If using fresh clams, add them to your pan. Close the lid on the pan and let the mixture simmer. It should take about 8 minutes for all clams to pop open. If some did not open, toss those aside.
Once all clams are open drizzle with half of the lemon, reserving the other half for serving.
Take out opened clams and set aside.
Add pasta to the white wine sauce. Toss gently adding the reserved pasta water.
Serve pasta in bowls with plenty of sauce. Add shells to the pasta and sprinkle with parsley.
Serve with a lemon wedge and enjoy!