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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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backups for SD card disk image? that don't take up tonnes of space and can be rolled back? (lemmy.world)

submitted 3 months ago by RedSquadCampFollower@lemmy.world to c/linux@lemmy.ml

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I would like to make manual backups of an SD card as a disk image so that it can be easily recreated when needed. I'd like to keep a few versions in case there is a problem I didn't know about, it can be rolled back.

How can I do this incrementally, or with de-duplication, so that I don't have to keep full copies of the complete SD card? It's very big but most of the content won't be changing much.

It's for MiyooCFW ROM which is on FAT 32-formatted micro SD card.

Thanks for your help! Also let me know if I am going about the problem in a wrong way.

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[–] RedSquadCampFollower@lemmy.world 1 points 3 months ago

Thanks I will look at rdiff. I am not sure if rsync is able to "see inside" the *.img files to discern the individual files. If it can then it would be helpful because I could just re-write the same file over and over again and keep backups using rsync or any of the various rsync-derrived tools?

The filesystem will be cold at time of back up because I will need to shut it down, remove the card from the console and put it into my computer's reader so no worries about that.