I have 6 devices that i rsync to a central location to back them up. Ive been using ssh as the -e option. Problem is i use public key with passphrases, meaning to backup all six i need to go to each device and run the backup script. Since i typically backup /etc, /home, and /root this means entering sudo and the ssh passphrase 3x for each device.

I would much prefer a script that runs on back storage device that can pull the data from each device without having to use ssh (encryption is not necessary since all traffic is either local or going through a vpn connection).

I could then put this script in root’s crontab or make it a systemd service running as root.

But i dont know how i can remote sync without ssh

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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.

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