I would like to install Debian on a USB drive and boot it from there. I have a USB drive with 64 GB of diskspace.
So I installed Debian Jessie (non-free) on it, and installed GRUB on the USB drive itself. Now I choose to boot from that drive, but it doesn't boot. The computer starts and I just get a text cursor blinking whenever I try to boot from it.
What else should one do to make such a USB bootable?
I solved this by installing grub manually from another linux. After installing Debian on the USB drive, mount it to /mnt and then use the command
sudo grub-install /dev/sdb --force --boot-directory=/mnt
assuming that the device of the USB drive name is /dev/sdb (DON'T SUFFIX THIS WITH NUMBERS SUCH AS sdb1). You can know the device name using fdisk -l (run it only as root).
Note: As I was doing this with many other things I'm not sure whether it's boot-directory or root-directory. Please edit the question if you know the answer.