Originally Posted by
produnis
I already installed Ubuntu to every Mac I got here, and every Mac is able to boot Ubuntu using rEFIt.
Is it possible to use these Ubuntu-Installations to boot from USB-Stick?
I am thinking about an entry in GRUB2 that shows something like "Boot from USB-Stick"...
Does anyone know how to configure GRUB2 to do so?
Copy from the usb /boot directory, the 2 kernel files = vmmlinuz... and initrd.img...
Copy them to your internal HD linux partition root and rename them usbvmlinuz, usbinitrd.img. (name can be anything). ( Or alternately copy to your OSX partition via another usb stick or partition readable from OSX).
Then if your usb root is at /dev/sdb2 -
make a grub2 menuentry
Code:
menuentry "usb " {
search --set -f /usbvmlunuz
linux /usbvmlinuz root=/dev/sdb2
initrd /usbinitrd.img
}
(The catch is , if you upgrade kernel, you need to copy again to the internal HD.)
You can only boot directly from external using an EFI bootloader, that is what OSX does.
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