On Sun, 20 Nov 2022 10:47:22 -0500
Tom Horsley wrote:

> If I try the same thing with the Fedora 37 iso image file (looking up
> the CDLABEL to use via the isoinfo tool), it doesn't work.

Figured it out. I loop mounted the iso file and found a grub.cfg file
and interpolated the info in there to make this entry for booting the
f37 iso file off disk:

menuentry 'Fedora Workstation Live 64-bit 37 (1.7)' {
    set_data_usb_root
    set isofile="/images/Fedora-Workstation-Live-x86_64-37-1.7.iso"
    loopback loop "$isofile"
    linux (loop)/images/pxeboot/vmlinuz ${bootvid} 
root=live:CDLABEL=Fedora-WS-Live-37-1-7 iso-scan/filename="$isofile" 
rd.live.image
    initrd (loop)/images/pxeboot/initrd.img
}

Mostly just some directory name chages inside the image.

Now I can boot yet another iso image from the collection I have
on my handy utility usb stick.
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