This is a test of commonsense. Complete the next sentence:

How to install sliding closet doors
Remove any existing doors on your closet.
Use a drill to unscrew any hinges or tracks from your closet opening, and take off the old doors and set them aside. When you're finished, the opening to your closet should be free of any obstructions.
Measure the height of your closet opening. Use a tape measure to measure the distance between the floor and the top of your closet opening to get the height.