this post was submitted on 25 Jul 2023
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Linux

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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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How do you all go about backing up your data, on Linux? (lemmy.world)
submitted 1 year ago* (last edited 1 year ago) by Kalcifer@lemmy.world to c/linux@lemmy.ml
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I'm trying to find a good method of making periodic, incremental backups. I assume that the most minimal approach would be to have a Cronjob run rsync periodically, but I'm curious what other solutions may exist.

I'm interested in both command-line, and GUI solutions.

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[–] avidamoeba@lemmy.ca 2 points 1 year ago* (last edited 1 year ago)

Setup

Machine A:

  • RAIDz1 takes care of single-disk failure
  • ZFS doing regular snapshots
  • Syncthing replicates the data off-site to Machine B

Machine B:

  • RAIDz1 takes care of single-disk failure
  • ZFS doing regular snapshots
  • Syncthing receiving data from Machine A

Implications

  • Any single-disk hardware failure on machine A or B results in no data loss
  • Physical destruction of A won't affect B and the other way around
  • Any accidentally deleted or changed file can be recovered from a previous snapshot
  • Any ZFS corruption at A doesn't affect B because send/recv isn't used. The two filesystems are completely independent
  • Any malicious data destruction on A can be recovered from B even if it's replicated via snapshot at B. The reverse is also true. A malicious actor would have to have root access on both A and B in order to destroy the data and the snapshots on both machines to prevent recovery
  • Any data destruction caused by Syncthing can be recovered from snapshot at A or B