Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).

LOGNAME=...
PASSWORD=...

$ crontab -e

sudo -u пользователь rsync ...

rsync -e 'ssh -i /home/пользователь/.ssh/id_rsa' ...

$ sudo mkdir -p /root/.ssh
$ sudo cp /home/пользователь/.ssh/id_rsa /root/.ssh
$ sudo chown -R root:root /root/.ssh
$ sudo chmod -R go= /root/.ssh