• At your grub menu press "e" to edit boot options.
• You'll see a simple text edtor. Find the line that starts with "linux" and at the end of that line add a space and then init=/bin/bash.
• Hit F10 to exit the editor. The machine will boot.
• Remount your root filesystem read/write like this:
mount -o remount,rw /
• Change root's password by running ```
passwd root