raspistill, raspivid and raspiyuv are command line tools for using the camera module.
See guides for basic usage of each of the commands:
- raspistill
- Capturing still photographs with the camera module
- raspivid
- Capturing video with the camera module
- Time-lapse
- Taking pictures at regular intervals and stitching them together into a video
- raspiyuv
- Capturing still photographs and generating uncompressed YUV files
More documentation on the camera applications can be found here, whilst information on the camera hardware can be found here.