Follow the steps:
- Turn off UEFI in VM settings (if turned on)
- Hold Shift key on booting
- You'll be prompted with
boot:
- Press
Tab
to see the list of all the partitions - Load the partition with substituted init process:
boot: live rw init=/bin/bash
- Get grub menu at boot time
- Why init substitution is allowed
- List of the kernel parameters