Thank you, Santosh.
I made a curl command to check related values and tested on AEM 6.5 with Service Pack 6.5.8.
curl -s -u "admin:admin" http://localhost:4502/system/console/jmx/com.adobe.granite:type=Repository | grep -ie 'BackupInProgress\|BackupProgress\|BackupWasSuccessful' | sed -e "s/<[-a...
I know the backup progress txt file is one way to confirm it, but I am wondering if there is another way more reliable, not just see if there is an ongoing backup, but really see if the backup job is completed and completed successfully.