David Callaghan wrote:

I just installed 7.1 on an RS6000, and the first thing I did was to grep mysql, but now I have no prompt. Its like I'm in vi except I can't exit. I can't do anyhting except type.

grep is now searching for the word "mysql" on stdin. Hit Ctrl-C to kill it, or Ctrl-D to send it an EOF so that it will exit normally. man grep to get a better understanding of what happened.

Do I have to manually turn off the machine?

not ususally a good idea. ;)