[CentOS] What commands are available in recovery mode?

Thu Dec 30 01:09:13 UTC 2010
Mark <mhullrich at gmail.com>

I have a CentOS VM that I messed up and it now can't find /home
(because it's gone), so it comes up in recovery mode.

What can I do in recovery mode?  It won't let me modify any files,
which makes it hard to fix the fstab, so ...???