Question:
I can't get any response from my machine. Can you fix it?
Answer:
It's probably a flow control thing where somebody hit CTRL-S
and stopped tty output. If so, hitting CTRL-Q should
fix it.
For *nix -- If CTRL-Q doesn't fix it then type
CTRL-Z to stop the current process. If that gets you a
response then the process may be hung or just real busy.