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I have two Macs, backed up on a 3TB Apple Time Capsule. But I also have a Debian machine on the same local network, and I would like to back it up (at least one of its hard disks) on the same Apple Time Capsule. Is this possible?

To prevent misunderstandings: I found zillions of places on the Web where people explain how to use a Debian machine as a cheaper version of Apple Time Capsule. This is not what I need. What I need is to back up the Debian machine on a (real) Apple Time Capsule. Thanks in advance for any advice!

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    The time capsule can be mounted as a drive via AFP but note that in Debian you can have files that differ by just case so multiple files would map to one on the TC so not a safe backup – user151019 Dec 10 '14 at 18:47
  • @Mark: Debian supports both case-sensitive and case-insensitive filesystems, so it might be ok. Definitely something to take note of, though. – 0942v8653 Dec 10 '14 at 21:54
  • @0942v8653 Wrong way round what matters is HFS which is case insensitive so only case insensitive Debian would work and that is not standard – user151019 Dec 10 '14 at 22:05
  • @Mark: That's what I meant. I didn't know that Debian's FS was case-sensitive by default. It just depends on how it's configured. – 0942v8653 Dec 10 '14 at 23:48
  • @0942v8653 It is more than a simple choice OS X can run on either and a few things won't work I suspect on a Debian FS with cases insensitive a lot of things won't work – user151019 Dec 11 '14 at 0:12
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In AirPort Utility, turn off the backup feature, turn off disk encryption, and turn on disk sharing with a password. Now you can connect to the disk over the network using the AFP protocol.

In most graphical file explorers you can now connect to the disk using the address afp://<ip-address-of-airport>. To easily configure scheduled backups to the device, you can check out Déjà Dup (known as simply “Backup” in Ubuntu).

You cannot backuo your Macs using Time Machine and your Linux machine to the same device. The two setups are incompatible as Time Machine requires proprietary extension to AFP. I would recommend you get a cheap Raspberry Pi and a two-terabyte power-over-USB-external-disk to host your Linux backup needs. (Install openssh and ufw, and you’re basically done setting up a simplistic firewalled backup device on the cheap.)

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