18.104.22.168. Using the dd command to dump data
The dd command can be used to put data on
a disk, or get it off again, depending on the given input and
output devices. An example:
gaby:~> dd if=images-without-dir.tar.gz of=/dev/fd0H1440
98+1 records in
98+1 records out
gaby~> dd if=/dev/fd0H1440 of=/var/tmp/images.tar.gz
2880+0 records in
2880+0 records out
gaby:~> ls /var/tmp/images*
Note that the dumping is done on an unmounted device. Floppies
created using this method will not be mountable in the file system,
but it is of course the way to go for creating boot or rescue
disks. For more information on the possibilities of dd, read the man pages.
This tool is part of the GNU coreutils package.
The dd command can also be used to make a
raw dump of an entire hard disk.