0

When I boot I get the grub> command, where do I go from here?

Harry Gatley
  • 31
  • Find a computer that has an OS! See http://askubuntu.com/questions/372607/how-to-create-a-bootable-ubuntu-usb-flash-drive-from-terminal – user68186 Nov 26 '16 at 15:56
  • Does the USB stick have no O/S or does the other computer have no O/S? If the stick, probably easiest to rebuild the stick using Unetbootin from a Window machine, or mkusb or SDC if you use a Ubuntu machine. You could also drop the iso file onto the stick and modify grub, not so easy. – C.S.Cameron Nov 27 '16 at 02:24

1 Answers1

0

Open a terminal on your ubuntu system.

Type df -h This lists all your devices which are currently mounted to the file system. Now connect your USB-Stick and run df -h again. The new device is your USB-Stick. The left column gives the device name of your USB-Stick; it will be listed as something like /dev/sdb

You now need to unmount your stick. Run umount /dev/sdb1, replacing sdd1 with whatever your USB-Sticks's device name is (including the partition number). If your USB-Stick shows up more than once in the output of df due to having multiple partitions on the SD card, you should unmount all of these partitions.

Next you can run this command:

sudo dd bs=4M if=/path/to/your/isofile.iso of=/dev/sdb

Remember to replace /dev/sdb with your actual device name.

Please note that block size set to 4M will work most of the time; if not, please try 1M, although this will take considerably longer.

The dd command does not give any information of its progress and so may appear to have frozen; it could take more than five minutes to finish writing to the stick. To see the progress of the copy operation you can run sudo pkill -USR1 -n -x dd in another terminal. The progress will be displayed in the original window and not the window with the pkill command; it may not display immediately, due to buffering.

Now plug in the stick at the computer, which have no OS. You can now boot from the stick.

Jonas Hüsser
  • 90