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  • Posted in:

    • Linux

    ZenHub is Down Zenoss Problems

    by Mitch March 3, 2015 Comments are off

    Last time i experienced problems with Zenoss. Zenoss suddenly stopped getting information from the clients, stopped graphing client data and i did not know what the reason was for this situation. I tried removing and readding the client but the job of adding a new client was even not processed. When i tried to re-model […]

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  • Posted in:

    • Linux

    SSL Library Error: error:0906D06C:PEM

    by Mitch August 8, 2014 2 Comments

    Recently i was migrating an Apache HTTP Server (httpd) server from one linux machine to another. The problem was, that on the source linux machine Apache HTTP Server (httpd) was a custom compiled 2.4.4 and we were having constant problems when patching the linux machine (openssl libraries etc.). So we decided to replace the custom compiled Apache HTTP Server (httpd) with […]

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  • Posted in:

    • Linux

    Error: bad top line in state file – logrotate.status

    by Mitch August 7, 2014 2 Comments

    A while ago i noticed that /var partition on a certain server was almost filled up to a 100% up and started researching what caused this. I noticed that log files in /var/log directory were not rotating. I decided to run the log rotation manually when i got this error “error: bad top line in […]

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  • Posted in:

    • Linux

    Pnp4Nagios XML file not found Error – No Graphs

    by Mitch February 24, 2014 Comments are off

    Are you getting “Pnp4Nagios XML file not found Error”? Read this post and fix this error. Learn how to get Pnp4Nagios performance data graphs working.

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  • Posted in:

    • Linux

    Nagios Error: Could not open command file for update

    by Mitch January 23, 2014 1 Comment

    This is how you fix Nagios Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update on CentOS and Ubuntu Linux.

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  • Posted in:

    • Linux

    NRPE: Unable to read output – Nagios error

    by Mitch October 2, 2013 3 Comments

    Got “NRPE: Unable to read output” error in Nagios and do not know what exactly it means and how to fix it? Read this post and learn how to fix it!

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  • Posted in:

    • Linux

    This account is currently not available – Login Problem

    by Mitch August 7, 2013 4 Comments

    Got “This account is currently not available” error when trying to login via SSH? Read here what it means and how to quickly fix it!

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  • Posted in:

    • Linux

    Socket timeout after 10 seconds – Nagios

    by Mitch July 23, 2013 7 Comments

    Getting “CRITICAL – Socket timeout after 10 seconds” error in Nagios? Read this post and learn what this error indicates and how to fix it!

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  • Posted in:

    • Linux

    CHECK_NRPE: Error – Could not complete SSL handshake

    by Mitch June 21, 2013 23 Comments

    This is a How To guide on how to fix “CHECK_NRPE: Error – Could not complete SSL handshake” error in Nagios. Read this post on how to fix this issue and how to make sure it is fixed!

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  • Posted in:

    • Linux

    PING WARNING – DUPLICATES FOUND! – Nagios

    by Mitch May 7, 2013 3 Comments

    Lately i was migrating my Nagios monitoring server to a new hardware and also a new CentOS version (CentOS 5.9 -> CentOS 6.4). It was a completely new server with new Linux OS installed and everything was configured perfectly. When i migrated Nagios data to a newly installed server and switched the IP addresses, i started […]

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