On 07/25/2010 03:26 PM, Ross Walker wrote:
>
> Better then dd over ssh,
Well, no... If you're trying to do an *image*, you'll find that cpio
can't write an image out to a block device.
It's fairly easy to make dd as bandwidth efficient as clonezilla.
1: Clear all of the unused blocks on the local filesystem which you want
to image:
# dd if=/dev/zero of=/mnt/zero
# rm /mnt/zero
2: Copy your filesystem to a file:
# umount /mnt
# dd if=/dev/sdb1 of=/var/tmp/fs.img
3: Compress your filesystem image:
# bzip2 /var/tmp/fs.img
4: Copy the image to the remote system:
# ssh root@remote 'bzip2 -dc | dd of=/dev/sda1' < /var/tmp/fs.img.bz2
Can't get much better than that for low-volume copies. If you need to
repeat the process on a lot of machines, clonezilla gives you some nice
options. If you're copying files instead of images, cpio might be useful.
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