Booting usb drive from grub
If you are using a USB stick with a Full install, just boot the drive, open terminal and do a "sudo update-grub", this should add any OS's on the internal drive to the USB's grub. Not so easy with a Persistent USB drive, probably easiest to copy grub menuentries from an updated Full install if it is a grub2 type Persistent install per mkusb. Use grub rescue to boot from Windows XP partition, CD or USB. Then the grub menu of the Lubuntu on the USB drive showed up, chose the Windows XP entry grub-rescue prompt at booting, boot-repair fails to repair. 3. Unable to boot on Debian after cloning dual-boot from HDD to SSD. 0. Jul 29, · Before taking the drive out, locate where the vmlinuz and initrd.* files are located. You’ll need them later. Insert the USB drive and boot the system. When you get to Grub, press c to get to the ‘command-line’ option. Here is where it gets a bit tricky. In my case, I knew the root partition on the USB disk was /dev/sda1, yours may vary.