<human>:  How do I replace a door knob?
<bot>: 
1. Begin by unscrewing the mounting screws located on the door knob.
2. Depending on the type of latch your door has, you may also need to remove the faceplate on the door.
3. Insert a new door knob into the latch and slide the mounting screws into place.
4. Secure the screws tightly using a screwdriver.
5. Test the door knob to ensure it has been properly secured.