Do we install ISO, or how to point to ISO to get it to boot?

[no1xda]

Hello I've tested, and reviewed 80 Plus Widows, and Linux apps, and in 20 years, and installed Dual booting on at least 12 Plus different laptops! And they worked!
Lol!

But I'm stuck on the part when adding Ubuntu to 2nd boot slot, as what, or how to use or get a script to use??

1. Since there is no mention in G2W manual how is installation done / Ubuntu etc, to a partition without installing live distro to a partition via usb live install??
2. Where, or HOW, do I get Grub2whin to see Ubuntu after telling G2W, by choosing Ubuntu ISO thru drop down?

In other words, there are really, really great "how tos" to customize g2w, but where, and or how to point, or how to place a ISO of a distro, or what to do, besides customize g2w (which is excellent)?

I went to youtube university first. .lol . before coming here.... and great vids on "customizing" app interface, but not any actual . . . where to place, nor how to do the actual 2nd booted distro!

Thank you for your time!

[Drummer]

Hi,

First I need your Grub2Win diagnostics so that I can review your hardware configuration.

Realize that there are literally thousands of ISO distributions available in many different flavors.

Your question is sort of like "How do I build an airplane?" It just raises many more questions.
What kind of airplane? Jet or propeller?
Who is the manufacturer of the engine.
How many passengers?
Where is the airplane to be located?
etc.

It all depends on the content and structure of your particular ISO, the directory names and many other issues.

There is a generalized topic in the Grub2Win advanced help on booting ISO files.
It includes an example using the Ubuntu 21.10 Mate download.
This is just a guideline, there are many many variables involved.
You will have to experiment to get your particular ISO to work.

I will refer you to Ed P, who has booted many ISO's in his time.

I hope this helps.

Dave

[Ed P]

Hello no1xda,

As Drummer said there are thousands of ISOs in many different flavors. Possible ISO boot parms: boot=/, from=all, from=$iso, fromiso=$iso, findiso=$iso, iso-scan/filename=$iso, bootfrom=/dev/sda6$iso and each is unique to the ISO being booted. You find which one an ISO is using by searching thru the ISO's code.

This is the menu I used for a version of Ubuntu. I hope it helps.

#  Possible ISO boot parms:  boot=/,  from=all,  from=$iso,  fromiso=$iso,  findiso=$iso,  iso-scan/filename=$iso,  bootfrom=/dev/sda6$iso and each is unique to the ISO being booted. 

menuentry " Ubuntu ISO 21.04"  --class ubuntu --class icon-ubuntu {

     set iso='/ISOs/ubuntu-mate-21.04-desktop-amd64.iso'
     set bootparms='boot=casper iso-scan/filename='$iso' splash -- '

#    To save changes add "persistance" to the boot parms and create a file 
#      named casper-rw with an ext3 file system. 
#      https://www.pendrivelinux.com/how-to-create-a-larger-casper-rw-loop-file/ 

     search -f $iso --set=root
     loopback loop $iso
     linux (loop)/casper/vmlinuz $bootparms
     initrd (loop)/casper/initrd
     }

BTW I never install ISOs to my harddrive but the ISOs themselves are on my harddrive in a folder named /ISOs.