How to send a shutdown command to readynas after backup complete.

Sandshark, thanks, that sounds like the best and easiest solution.

In the mean time I have gone the hard way writing a script that runs every 10 minutes (cron.d) on the Pro:

first it checks in /etc/frontview/backup_jobs.conf which backup jobs are created and are actif,

Than it checks if the corresponding backup status files in /var/log/frontview/backup/ are created/modified today. (do i still need this?)

Subsequently, it checks if the status in all relevant backupfiles is completed ok.

If so than the script remotely executes a local  bash script on the NV+ which shuts it down in the same way the timer does.

Pffff, the clearly the hard way. It works fine now, but yours is much simpler, I'll test that.

For anyone interested the rudimentary scripts, everything runs on the Pro:

Main script

#!/bin/bash

logger Backupcheck_started

partstatfilestring=/var/log/frontview/backup/status_backup_
arjobnr=($(grep -B 3 "<enabled>1</enabled>" /etc/frontview/backup_jobs.conf | grep "<job_id>" | cut -c 13-15))

for jobnr in "${arjobnr[@]}"; do
  jobstatusfile="${partstatfilestring}${jobnr}"
  if [[ $(date +%D -r "${jobstatusfile}") == $(date +%D) ]]; then
    grep -q '^BACKUP_STATUS__COMPLETED!![0-9]*!!OK$' "${jobstatusfile}"
    if [[ $? -eq 0 ]]; then
      grep "SHUTTING_DOWN_NV+" "${jobstatusfile}"
      if [[ $? -ne 0 ]]; then
        ((bkpjobscomplete++))
      fi
    fi
  fi
done

if [[ "${bkpjobscomplete}" = "${#arjobnr[@]}" ]]; then
  logger All backup jobs completed, starting shutdown NV+.
  for jobnr in "${arjobnr[@]}";  do
    jobstatusfile="${partstatfilestring}${jobnr}"
    echo "SHUTTING_DOWN_NV+" >> "${jobstatusfile}"
    ssh root@biliton 'bash -s' < /root/shutdownNV.sh
  done
else
  logger Backup not started or not completed, shutdown NV+ postponed.
fi
exit 0

and the local remote shutdown script.

Local remote shutdown script.

#!/bin/bash

/frontview/bin/autopoweroff &> /dev/null

exit 0

Now that I have shared this I'll test Sanshark's approach.