====== DD ======
===== How to clone an entire hard disk =====
<code bash>dd if=/dev/sdc of=/dev/sdd bs=64K conv=noerror,sync</code>
===== How to clone a partition =====
<code bash>dd if=/dev/sdc1 of=/dev/sdd1 bs=128K conv=noerror,sync</code>
===== make disk image =====
<code bash>dd if=/dev/da0 conv=sync,noerror bs=128K | gzip -c > centos-core-7.gz</code>
===== restore system =====
<code bash>gunzip -c centos-core-7.gz | dd of=/dev/da0</code>
===== Use remote storage =====
<code bash>dd if=/dev/da0 conv=sync,noerror bs=128K | gzip -c | ssh user@server dd of=centos-core-7.gz</code>
===== See progress while making an image with dd (dd with coreutils) =====
<code bash>dd if=/dev/sdc1 of=/dev/sdd1 bs=128K conv=noerror,sync status=progress</code>
===== copy MBR =====
<code bash>dd if=/dev/sda of=/dev/sdb bs=512 count=1</code>
===== Backup MBR and Extended Partitions Schema =====
<code bash>dd if=/dev/sda of=/tmp/backup-sda.mbr bs=512 count=1
sfdisk -d /dev/sda > /tmp/backup-sda.sfdisk</code>
===== Restore the MBR and the extended partitions =====
<code bash>dd if=backup-sda.mbr of=/dev/sda
sfdisk /dev/sda < backup-sda.sfdisk</code>