AlexNogard: IT HowTo

Linux & Opensource : Monitoring : Centreon, Nagios, Owncloud ..

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Centreon : Update 2.3.8 to 2.4.5 on Centos 6.X

Logo CentreonThe 2.4.X Centreon version are now stables for some times. Here is a small Howto explaining how to update your Centreon 2.3.x to the latest stable release date: Centreon 2.4.5.

I am currently using Centreon 2.3.8 on Centos 6.4. The broker is ndo2db with Nagios core. This tutorial is the next logical howto : Installing Centreon 2.3.8 on Centos 6.2. Approach is almost the same with Broker :  Centreon-Broker.

Here’s how to update Centreon 2.3.8 to Centreon 2.4.5 with Nagios & ndo2db.

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Monitoring Oracle Database with Check_oracle_health & Nagios / Centreon

oracle logoCheck_oracle_health is a great Oracle Database monitoring Tools. This plugin help you retrieve a variety of data such as the time to connect to a database, the number of connected users, the invalid objects sum, free space in a tablespace and many other counters …

We will use it with Centreon to exploit check_oracle_health data monitoring  as graphs. A dedicated Nagios part is also in this article.

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Howto reset your Centos Root password

root linux

Your Linux machine is so stable that it’s been several months since you didn’t log on it. Bad luck, you do not add the Root password in your password manager. You are trying to connect, trying every conceivable password, impossible … you forgot! No Stress, here’s a technique that let you reset your root password on your CentOS.

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Howto Install nagios 4.0.1 on Centos 6.4

logo nagios

Nagios is a monitoring tool under GPL licence. This tool lets you monitor servers, network hardware (switches, routers, …), applications and services. A lot of plugins are available (more than 3000) and its big community makes Nagios the biggest and the most maintained open source monitoring tool. This tutorial shows how to install Nagios 4.0.1 on CentOS 6.4.

Nagios 4 is the latest stable release published the 20th of last september. This release improved disk I/O latency, some new configuration variables, and other specifications available here : What’s new in Nagios core 4.X.X.

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Owncloud : The files you are trying to upload exceed the maximum size for file uploads on this server.

max_file_size owncloud

“Upload too large : The files you are trying to upload exceed the maximum size for file uploads on this server.”. After installing owncloud, this type of error can happen, depending on the type of files you uploaded,more or less voluminous they are.

Here’s how to solve the problem MAX_FILE_SIZE (really be on the safety of its server before changing its values) :

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