What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Monitor a file for when it stops making changes.




We have a program that writes changes/logs to a txt file every minutes. This file does not update it's "modified date" for sometimes up to a week even tho there are changes being made to the file every minute. (As the file remains open when in use by the software)

How can I monitor the file so PRTG can tell me when the changes to the file stop happening? I tried using a checksum sensor but this only alerts me when changes are happening (every minute) not when they stop happening.

Any suggestions?

Thanks, David.

checksum file prtg

Created on Sep 25, 2012 1:48:24 AM

2 Replies




I'm afraid that might only be possible with a self written Custom Script Sensor, which maybe runs at a scanning interval of 5 minutes, stores the checksum in another logfile, and then returns an error to PRTG if the checksum is the same on two consecutive scans.

best regards.

Created on Sep 25, 2012 2:12:48 PM by  Torsten Lindner [Paessler Support]



Thanks Torsten, I'll look into writing our own script.

Perhaps this is something Paessler could include in an update?

Regards, David.

Created on Sep 25, 2012 11:12:35 PM

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.