how do I use shell.c?

[mike]

I'm new to RTEMS. Is the file shell.c in .../cpukit/libmisc/shell
something like vxWorks' shell? How do I make use of this
RTEMS shell?

Is there anything else that I can use to display/monitor/manipulate a 
running system
in realtime (tasks/semaphores/resources/rearrange priorities etc...)?

Thanks.
 -mike-