cd /var/www/nextcloud 
sudo -u www-data php occ maintenance:mode --on
tar -cpzf /mnt/Share/Backups/Nextcloud/NextcloudBackup_FileDir.tar.gz -C /var/www/nextcloud .
tar -cpzf /mnt/Share/Backups/Nextcloud/NextcloudBackup_DataDir.tar.gz -C /var/nextcloud_data .
mysqldump --single-transaction -h localhost -u nextcloud_db_user -p nextcloud_db > /mnt/Share/Backups/Nextcloud/NextcloudBackup_DB.sql
cd /var/www/nextcloud 
sudo -u www-data php occ maintenance:mode --off