mkdir /mnt/sda2
mount /dev/sda2 /mnt/sda2
mount /dev/sda3 /mnt/sda2/home
sudo mount -o bind /dev/mnt/sda2/dev
sudo mount -o bind /sys /mnt/sda2/sys
sudo mount -t proc /proc /mnt/sda2/proc
sudo cp /proc/mounts /mnt/sda2/etc/mtab
sudo chroot /mnt/sda2 /bin/bash