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How can i rsync over my network without using ssh?
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this post was submitted on 04 Feb 2024
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I am also going to recommend the same solution as @matcha_addict@lemy.lol in this comment: https://lemmy.ml/comment/7998407
Basically, you can tell SSH to allow root login on certain devices by setting up a root key pair. You configure SSH on the target device such that when it logs in, the login must run a script or a single command instead of running a shell, this limits what attackers can do if they somehow steal your private keys. You can also keep these private keys in your SSH agent so you only have to enter their passwords once, this will allow you to run remote commands without a password.
I would recommend also exploring the possibility of setting up an Rsync Daemon on each remote device, it keeps an Rsync process running on a remote device and listens for connections from Rsync clients. https://linuxconfig.org/how-to-setup-the-rsync-daemon-on-linux
On an unrelated topic: you might also want to look into using Btrfs and making and transferring snapshots to other devices.
There's a somewhat more secure way to go about it.
A backup script on the host in question runs periodically as root and makes a local copy of the files owned by the backup user. The central host then makes a backup of the not-root-owned files on the host in question. It adds two extra steps but you don't have to set up SSH access for the root account.
I have decided to use rrsync to do this.
Im using btrfs on the back drive but using ext4 on the remote devices. Wont the snapshots, if sent to a remote device be the same size as the original data?
I guess the Btrfs snapshopt approach is not possible for your setup since the devices you want to backup are not Btrfs and cannot create snapshots.
Yes, the snapshots will be the size of the whole partition, I had not thought about that problem. I do not know if it is possible to create incremental snapshots with Btrfs.