Can't boot your Ubuntu server?
Garbled GRUB file got you down?
SSH on the fritz?
Driving you crazy and ready to DELETE AND REINSTALL the O.S.???
Quick and Simple chroot to server stuck in Limbo
Wait one. Well, I can't guarantee a solution, but this strategy has worked for me a few times.
First Things, First
Grab yourself of LiveCD. Distro does not matter. Version does not matter. You're looking for a Linux distro that will allow you to run and enter the console (terminal).
All of the following needs to be run as sudo.
Create a mount point:
Mount /proc /sys /dev to chroot:
mount -o bind /proc /mount/point/proc
mount -o bind /dev /mount/point/dev
mount -o bind /dev/pts /mount/point/dev/pts
mount -o bind /sys /mount/point/sys
Copy resolv.conf to networking:
cp /etc/resolv.conf /mount/point/etc/resolv.conf
Open bash in chroot
chroot /mount/point /bin/bash
Do what you need to do (i.e. fix whatever is broken), then exit chroot.