Rescue Grub Menu part 1 Installing Super Grub2 Disk Iso

(in Terminal):
1./ sudo apt-get install grub2

I chose YES and next between few positions, I chose main, whole disc dev/sda (not sda1, sda6 or others but main 'dev/sda')

2./ sudo upgrade-from-grub-legacy
3./ reboot

GNU GRUB is a boot loader package from the GNU Project. GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of ... Wikipedia
Operating system: Linux, macOS, BSD, Solaris (x86 port) and Windows (through chainloading)
Stable release: 2.02 (GRUB 2) / April 26, 2017; 21 months ago
Preview release: 2.02~rc2 (GRUB 2) / March 15, 2017; 22 months ago
Developed by: GNU Project
Platforms: x86-32 (32 bit Intel x86), x86-64, IA-64, ARM architecture, PowerPC, MIPS architecture, SPARC
Written in: Assembly language, C

[AtomicChicken-cq]

Damn it. I was distracted by that cool tune. I must watch vid again....on IT. NO CREDIT GIVEN, NAME THAT TUNE!