mc68k said:yes, it saves your work back to the last checkpoint
you can run fah5 in the background (w/o the Terminal open) by appending the & symbol the the end of the command
if you sleep the process should start back up automatically.
If you did this would you have to stop terminal through Activity Monitor or how could you halt it? There are times I don't want my cpu running 100%, so it would be nice set things on pause or off, just for a while