GRUB errors

After a migration of my home server to a new mirrored 500GB sata setup from my old 160GB pata system, I encountered some problems with booting the server. Intially booting stopped at:

GRUB _

This was fixed by booting from the FC6 DVD and selecting "linux rescue". I then chrooted to my install with "chroot /mnt/sysimage", followed by a "grub-install".

This fixed my first problem but now boot was hanging at:

GRUB loading stage 2

So again, back into the rescue boot and my chroot environment. Now I ran "/sbin/grub" which took me into the grub shell. I ran "root (hd0,0)" to use the first partition of the boot disk, then ran "setup (hd0).

Next boot all was well.

X Forwarding problems

I've set up a new Fedora 6 server using Xen (another story), but no xorg packages were installed. When logging in over ssh with X forwarding enabled (ssh -X) I still couldn't run any GUI applications remotely. Logging in with debug (ssh -Xv):

debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Remote: No xauth program; cannot forward with spoofing.

Turns out the solution is to install xauth:

# yum install xorg-x11-xauth.i386