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Is there any program that can be installed on CentOS and notify a via email when a webserver/site/webservices drops and does not respond anymore?

I was trying to use Cacti, but as I have been answered here, Cacti is used for graphs

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4 Answers 4

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Other than writing your own cron script, I'm not sure about it running on your own CentOS server. I use pingdom myself though. https://www.pingdom.com/

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Try this solution that uses the built-in utility cron. As written, this script will detect a failed service and restart it. But it won't detect a running, non-responsive service. For that case, you could add a few lines that use curl to test a website URL for HTTP response code, and then you could restart the service if you get anything that is 4xx or 5xx. https://stackoverflow.com/a/9072923/5759901

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I personally use something outside of my network for monitoring (specifically UptimeRobot).

However when searching around, I saw StatPing being mentioned at the time, a quick search revealed StatPing is dead, and StatPing-NG is the new king.

If you are using docker with the restart: always (or unless-stopped) option, you will not need to touch your cron config either.

Another alternative that seemed interesting is Uptime Kuma

Hope this sends you in the right direction.

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You can use WebChangeMonitor.

It's an open-source cross-platform tool that allows you to monitor 1 or more web sites or services.

It can check for content, header, or ping changes/responses manually or on a schedule you determine.

Currently, it has releases for Linux, Windows, and Raspberry Pi. Furthermore, the source code (written in C++) is designed so it can be adapted to other operating systems.

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