Linux/Backup

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< Linux
Revision as of 15:06, 29 November 2012 by Marcluer (talk | contribs) (→‎DD)

DD

Backup

  • simple backup to image file
dd if=/dev/sda | gzip > image.dd.gz
  • gzip image without dd
gzip -c < /dev/hda1 > /tmp/partition_image.gz
  • bootloader
dd if=/dev/sda of=bootloader.img bs=446 count=1
  • MBR + partitiontable
fdisk -lu
dd if=/dev/sda of=mbr.img bs=512? count=1? 63?

Backup over network

  • Target
netcat -l 5555 | dd of=image.dd.gz


  • Source
dd if=/dev/sda | pv| pigz | netcat $TargetIP 5555

Status

  • dd status
while /bin/true; do sleep 5; kill -USR1 `pidof dd`; done

oder 

watch -n N kill -USR1 `pidof dd`


Loop

  • mount image as loop
mkdir /mnt/loop
mount -o loop image.dd /mnt/loop
umount /mnt/loop



other

  • dd random
dd if=/dev/random bs=1M count=256 | gzip >./256-MB-random-data.bin

Links

Retrieved from "https://wiki.marcluerssen.de/index.php?title=Linux/Backup&oldid=442"