I erased everything from my hard drive, partitioned it with GParted, and installed Knoppix. But the GRUB menu doesn't show up at boot time. I want GRUB to appear because I want to install Debian 10 on top of Knoppix for dual boot. I don't like the look and feel of the GRUB that comes with Knoppix 10, and websites that I consulted told me to set up GRUB to MBR with the installation of the first OS for dual boot.

So how can I install GRUB to MBR from the Knoppix 8.1 live DVD?

Your help is greatly appreciated, and I thank you in advance.