Linux/Backup

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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 --best | netcat $TargetIP 5555

Status

dd status

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

or

watch -n N kill -USR1 `pidof dd`

pv

dd if=/dev/sda | pv | dd of=image.dd

pv -s 60G    -> for estimate

Loop

mount image as loop

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

rsync

rsync -v -P -r --delete --bwlimit=10000 /mnt/vm-host_backup/05_vm-host /mnt/backup

other

dd random

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

Backup Manager

/backup (ln /filesystem/80_backup/10_autobackup)
/backup/!backupmanager
/backup/10_vm-host

Backup Software

BackupPC (1M+, 31*
Duplicity (500k+, 14*)
Duplicati (10M+, 139*)
Borg (1M+, 16*)
Bacula
Restic (10M+, 16*)
UrBackup (5M+, 23*)
BackupNinja

Links