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I need to monitor a Linux server. I'm searching for a monitoring tool able to store system information (CPU, RAM disks usage, Apache and Postfix status, etc.) throughout the day and send an email every day with a complete report.

Every monitoring tool I saw (nagios, monit, cacti, ...) has a web interface or it opens a port enabling a client access on the server. For security reasons I need to avoid this.

Any suggestions?

  • sar from the sysstat package? – Martin von Wittich Mar 26 '15 at 11:20
  • Sounds like you don't care whether the tool has a network interface; you care that any network interface that is available can be disabled. – G-Man Mar 26 '15 at 11:22
  • I would write a custom made script and setup a ssh passwordless authentication to the servers I wanted to monitor. No risk of opening another port here. – Govind Kailas Mar 26 '15 at 11:41
  • thank you, i think sysstat will be perfect. – Davide Mar 26 '15 at 16:15
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I can suggest you a tool but I'm afraid it also has a web interface. It's called SeaLion. Even after knowing your apprehension for such tools I'm still suggesting you this tool because:

  1. The agent runs as an unprivileged user.
  2. All data transfer takes place over SSL connection.

So this should address your security concern.

The tool has a 'daily digest' feature that sends you an email everyday reporting any of the system metrics that crosses threshold. For more information refer to their website. I'm currently using this tool and so far it has been a smooth run.

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