Is there any such images in existence that will allow me to install 64-bit Ubuntu if supported, or fallback to 32-bit otherwise?
I'm participating in an installfest by a new and unofficial LoCo, and such an installer would be quite handy without wasting extra DVDs for different architectures.
You can create a DVD that contains both versions of the live CD:
Create a folder structure for the DVD:
$ mkdir -p ubuntu-13.04-desktop-i386-amd64/boot/{grub,iso}
$ mv ubuntu-13.04-desktop-{i386,amd64}.iso ubuntu-13.04-desktop-i386-amd64/boot/iso/
Save the following as ubuntu-13.04-desktop-i386-amd64/boot/grub/grub.cfg:
# Derived from /boot/grub/loopback.cfg from ubuntu-13.04-desktop-i386.iso and ubuntu-13.04-desktop-amd64.iso.
menuentry "Try Ubuntu without installing (32-bit)" {
loopback iso /boot/iso/ubuntu-13.04-desktop-i386.iso
linux (iso)/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-i386.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Try Ubuntu without installing (64-bit)" {
set gfxpayload=keep
loopback iso /boot/iso/ubuntu-13.04-desktop-amd64.iso
linux (iso)/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-amd64.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Install Ubuntu (32-bit)" {
loopback iso /boot/iso/ubuntu-13.04-desktop-i386.iso
linux (iso)/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-i386.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Install Ubuntu (64-bit)" {
loopback iso /boot/iso/ubuntu-13.04-desktop-amd64.iso
linux (iso)/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-amd64.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Check disc for defects (32-bit)" {
loopback iso /boot/iso/ubuntu-13.04-desktop-i386.iso
linux (iso)/casper/vmlinuz boot=casper integrity-check iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-i386.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Check disc for defects (64-bit)" {
loopback iso /boot/iso/ubuntu-13.04-desktop-amd64.iso
linux (iso)/casper/vmlinuz.efi boot=casper integrity-check iso-scan/filename=/boot/iso/ubuntu-13.04-desktop-amd64.iso quiet splash --
initrd (iso)/casper/initrd.lz
}
menuentry "Test memory" {
loopback iso /boot/iso/ubuntu-13.04-desktop-i386.iso
linux16 (iso)/install/mt86plus
}
Generate an ISO image (You may need to install xorriso.):
$ grub-mkrescue --output ubuntu-13.04-desktop-i386-amd64.iso ubuntu-13.04-desktop-i386-amd64
You can now burn ubuntu-13.04-desktop-i386-amd64.iso (1.6 GB) to a DVD and choose either 32-bit or 64-bit options at boot.
Note: This worked for me in a virtual machine. I strongly recommend testing it using one DVD before burning multiple copies.
grub.cfg. But UEFI mode not worked.
May 4, 2014 at 6:48
To my knowledge, no there isn't. If you want to spare DVDs, you can use USB sticks (assuming you have one (or more than one) and your computer supports booting from USB stick).
In Ubuntu download page, there is step-by-step instructions for creating bootable Ubuntu USB sticks in Linux, Windows or Mac OS X.
There is no official 32/64 bit image available and I'd doubt if you would be able to compile one to do what you want.
The difference between 32 and 64 bit is hardware based so having two cd's or usb keys with 32bit and 64bit version of Ubuntu on them would be your best option.
If you only have access to one cd or usb create a 32 bit install - it will be usable on both types of architecture.
Another possibility could be to use dual-sided DVD (note: it's different from dual layer DVD), so you record on one side the 32-bit version and on the other one the 64-bit version.
If you have an Windows computer then the multiboot version of the Pin Drive Linux app can make one for you. Their are verisons for Mac and many more but the Windows one is the fail seft version.
