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| This article is a couple of years old and I have already moved all of my precious data into the cloud. Because the flying spaghetti monster will save us all. Not.
| | <a href=https://essaywritingservices.us.com/>writing essay services</a> |
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| ...but I am still convinced this may be helpful to you.
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| <blockquote>
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| Jesus saves. Buddha does incremental backups.
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| </blockquote>
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| In celebration of [http://ask.slashdot.org/story/12/03/31/1543200/ask-slashdot-its-world-backup-day-how-do-you-back-up World Backup Day], I hereby release my backup strategy.
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| == Features ==
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| * daily backup, fully accessible
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| * compressed storage
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| * block device encryption
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| * '''speed'''
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| == Requirements == | |
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| * external harddrive
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| * modern linux kernel (use [[Wikipedia:Arch_Linux|Arch Linux]]!)
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| * current version of btrfs-progs (I have 0.19.20120110-2)
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| * a strong password (you may follow [http://www.thegeekstuff.com/2008/06/the-ultimate-guide-for-creating-strong-passwords/ this] guide or similar)
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| == Daily Routine ==
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| # Wake up
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| # Drink tea
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| # Go shit
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| # Exercise Yoga
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| # Eat breakfast
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| # '''Backup ALL the files''' (during hygiene)
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| # Leave home
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| My external harddrive is totally occupied by a [[Wikipedia:Linux_Unified_Key_Setup|LUKS]] container. After connecting the drive to my laptop, I start like this:
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| cryptsetup luksOpen /dev/sdb backup
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| If not happened yet, format the drive with a [[Wikipedia:Btrfs|btrfs]] filesystem
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| mkfs.btrfs -L backup /dev/mapper/backup
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| Then, mount it and use compression
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| mount -o compress=lzo -t btrfs LABEL=backup /media/backup
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| If not happened yet, create a subvolume
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| btrfs subvolume create /media/backup/nomaster
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| For may backups, I use rsync (with delete) to copy my files to an external hard drive. Vanished files will be deleted.
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| rsync -aPv --delete --exclude downloads --exclude music --exclude .cache /home/nomaster/ /media/backup/nomaster/
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| After each sync, I make a snapshot of this state of my files.
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| sudo btrfs subvolume snapshot -r /media/backup/nomaster /media/backup/nomaster-$(date +%F)
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| Lastly, I unmount the filesystem and close the container.
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| sudo umount /media
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| sudo cryptsetup luksClose backup
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| Then, I disconnect the drive.
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| When my drive will be full at some point in the future, I’m going to remove old snapshots to free space occupied by large files deleted a long time ago.
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| == Initial Setup ==
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| '''I assume the external drive is /dev/sdb. If you have no idea about this, stop right now and come back when you know.'''
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| First, make sure, the external drive is clear to use. So mount it and have a look at the files if present.
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| Overwrite everything with zeroes.
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| sudo dd if=/dev/zero of=/dev/sdb bs=1024
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| Format the drive
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| sudo cryptsetup luksFormat /dev/sdb
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| (follow the instructions)
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| Open the crypto container
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| sudo cryptsetup luksOpen /dev/sdb backup
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| Create a BTRFS file system
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| sudo mkfs.btrfs /dev/mapper/backup
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| Mount it (with compression)
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| sudo mount -o compress /dev/mapper/backup /mnt
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| Create a subvolume
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| sudo btrfs subvolume create /mnt/nomaster # <- insert username here
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| Unmount, close and continue with '''daily routine'''.
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| sudo umount /mnt
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| sudo cryptsetup luksClose backup
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