I already tried to do everything:
1.:pi@192.***.***.**:/media/backupdrive/remotebackupfolder
2.: User pi already have permissions for the btrfs command
3.: ssh autologin with root for backupPi is setup as followed:
Edit the file /lib/systemd/system/getty@.service and change the line
ExecStart=-/sbin/agetty --noclear %I $TERM
to
ExecStart=-/sbin/getty/ --noclear -a root %I $TERM
getting following error in the web panel:
[ nc-snapshot-sync ]
Host key verification failed.
SSH non-interactive not properly configured
(I simply used an nextcloudpi image for the backupPi because you can enable easily auto-mount and format the usb-drive to btrfs)
How can I add a Host key verification?