> What about CTRL+S (XOFF)? I had very bad times in discovering the shell was 
> freezing because I actually told it to `:D
> If that is the case, CTRL+Q (XON) will bring it back to life :)

It is worse when you've accidentally told the keyboard to freeze
(typically by catting a binary file or directory).

It is quite difficult to realise the machine isn't completely
stuffed, and quite hard to generate the required ^Q.
Worse still the serial driver probably waits forever waiting for the
output to drain if you close the device - so even that doesn't help.

	David

-- 
David Laight: david@l8s.co.uk