Answer 3: To use a webcam, (USB one)
(a) plugin webcam, run lsusb at terminal, note down the make and type
(b) search for driver for that make & type, normally spca5xx driver (
http://mxhaard.free.fr/download.html) supports most of the comman webcams. So if your make is supported then download & install spca5xx driver, else google for your driver.
(c) Once driver is installed, you can use camstream and videolan-client to use the webcam (you can also use spcagui20060127.tar.gz)
If the lsusb command gives the error bash:lsusb:command not found then run /sbin/lsusb at terminal