I am using OpenHab more and more and not having a backup was starting to worry me. There are better solutions, but this works for me. I have a 1TB usb PCIe HDD which the OpenHabian is now running as the house nas, and this solution makes a backup each night and copies the newest file to the NAS with a full backup each Sunday.

It has to be run as root cron:

sudo crontab -e -u root

Then this is the cron for root:

10 2 * * * /home/openhabian/bin/backup-openhabian.sh

And this is the script:

#!/bin/bash

##############################
#  MUST be run by root cron!!
##############################
if [[ $(date +%u) -gt 6 ]]; then
    openhab-cli backup --full
else
    openhab-cli backup
fi

# Copy to the nas
echo Copying the newset file to the NAS folder...
file=$( ls -t /var/lib/openhab/backups/* | head -1 )
cp $file /mnt/nas/backup/openhabian/

# delete files older than 7 days
echo Deleting anything older than 7 days...
find /var/lib/openhab/backups/* -mtime +7 -exec rm {} \;
echo Done!

Restoring

https://community.openhab.org/t/solved-backup/57666 is for OH2, but I guess it will work the same. I really need to practise that with a blank SD card.

sudo systemclt stop openhab
openhab-cli restore /var/lib/openhab/backups
sudo systemclt start openhab