3

it is possible to make a full disk image with running ubuntu with following command:

dd if=/dev/sda of=/image_name

After i make it, how can i restore that image on a crushed system?

  • 3
    Three things I would suggest. One: do it from a live CD. Two: make sure the image you create is not on the same volume as the one being copied. Three: this will probably only work if both hard drives are the same size. – zeitue Aug 11 '14 at 5:54
  • How can i do that from liveCD? AFAIK from liveCD you can't do any write actions. – Alexander Kim Aug 11 '14 at 6:39
  • @Heihachi why would you not be able to write to a harddisk from a live DVD? – Rinzwind Aug 11 '14 at 7:34
  • I would suggest using a USB hard drive as the location to sent the image – zeitue Aug 11 '14 at 8:14
13

Boot from the live cd. Mount your destination media to (say) /mnt.

dd if=/dev/sd whatever of=/mnt/mybackup.ddimg

To restore:

dd if=/mnt/mybackup.ddimg of=/dev/sd wharever

The destination drive should be the same size or bigger than the original.


A better way is using tar.

Mount the source to /mnt, mount the destination to /home (say)

tar cvfpz /home/mybackup.tar.gz   /mnt

This can then be restored to any size drive:

tar xvfpz /home/mybackup.tar.gz

(After mounting source to /home and destination to /mnt.)

Then just install grub.

  • Any particular reason for .ddimg? – Hashim Mar 30 '18 at 23:12
  • This question is 3 years old, however feel free to ask the OP why he wanted to use dd – hatterman Mar 31 '18 at 10:53
  • No, my question was about the .ddimg extension that you used. I know enough about dd to know the extension of an image file is largely irrelevant, so I'm wondering whether there's a particular reason you used .ddimg instead of the more common .img or .dd that I've seen, or even no extension at all. – Hashim Mar 31 '18 at 22:32
  • 1
    No reason, its just so I know what the file is further down the line. Just my preference. – hatterman Apr 1 '18 at 11:04
0

In addition to hatterman's great answer you can compress the image as it's taken using gzip like this:

dd if=/dev/sdx | gzip > /mnt/mybackup.ddimg.gz

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