From MythTV Official Wiki
mythtv-setup is a configuration utility for configuring Mythbackend. This utility must be used before attempting to run the backend for the first time.
By running myhtv-setup one gets...
- Capture cards
- Video sources
- Input connections
- Channel Editor
- Storage Directories
- System Events
- mythfilldatabase -- you will want to run this program after making any additions or changes to the channel lineup in "video sources" or "channel editor".
All these sections are briefly explained in: