For using a shell commands through a terminal program, where can I find documentation or help or man pages for the commands as implemented in Android? While it would be nice to have them on the device via man, PDF or web-based would be fine, too. When I run "man" from terminal, I get an error and I haven't found a good source online.

My device is already rooted, this is why I'm asking. Do you need root to monitor the logcat stream on the phone? If I ran the logcat command from within a Terminal on the phone, would that work?