Backing up Pi using Synology and rsync (works for DSM 6)

I followed this guide, but made some changes. For starters, DSM had been updated after the guide was written, so the following link needs to be used to change the root password.

https://superuser.com/questions/1056922/synology-ssh-root-password-does-not-work

Before configuring each Pi for which a backup is desired, make the following temporary change:

sudo nano /etc/ssh/sshd_config
PermitRootLogin yes
sudo /etc/init.d/ssh restart

then change back to "PermitRootLogin without-password" once finished with setup and restart the SSH service.

Additionally, make sure to switch to root on the Pi using sudo -i and create a ".ssh" directory with mkdir .ssh.

Also, use the following "backup_target.sh" because the path to rsync has changed from the original, and because this provides a better log format (imho).

 SERVER=$1  
 ADDRESS=$2  
 NOW=`date +"%Y-%m-%d"`  
 LOGFILE="$SERVER-$NOW-log.txt"  
 ping $ADDRESS -c 10 >> /volume1/backups/logs/$LOGFILE  
 /usr/bin/rsync -av --delete --exclude-from=/volume1/backups/_scripts/rsync-exclude.txt -e "ssh -p 22" root@$ADDRESS:/ /volume1/backups/$SERVER/ >> /volume1/backups/logs/$LOGFILE 2>&1  

Todo: https://unix.stackexchange.com/questions/14191/scp-without-replacing-existing-files-in-the-destination

Update (For the life of me, can't get this to work): http://blog.tafkas.net/2015/01/15/monitoring-a-synology-diskstation-with-munin/