Try the HiveMQ MQTT broker on CentOS 6.x

Posted on Tue 18 June 2013 in IoT • Tagged with broker, CentOS, cluster, hivemq, m2m, MQTT, server

What is MQTT?

MQTT is the short name for MQ Telemetry Transport. It is a TCP based protocol which implements the publish and subscribe pattern. While the pubish and subscribe method became popular these days for mobile devices MQTT is one of the protocols becoming more and more popular. Actually …

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Secure your browsing in a non trusted (wifi) network

Posted on Fri 03 February 2012 in Linux • Tagged with CentOS, OpenVPN, Linux

As I wrote in an older post there is a simple solution using ssh to tunnel your webbrowser traffic through an ssh connection to a secure and trusted endpoint. This is a very simple solution to secure your access to the web while you are in a public wifi network …


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Install nginx on CentOS 6

Posted on Sun 22 January 2012 in CentOS • Tagged with CentOS, Nginx

If you want to have the latest version of nginx on your CentOS system the easiest way is to use the official yum repository from the nginx program. The version contained in the EPEL repository is quite old.

Download the repo RPM from http://nginx.org/packages/centos/6/noarch …


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ssh -X doesn't work on CentOS

Posted on Thu 13 October 2011 in Linux • Tagged with CentOS, security, SSH

If you installed the server without GUI it may is useful sometimes to have a GUI output via ssh on an different computer.

You can connect with ssh to the server and present the output on you local machine by using ssh with the option -X. You need to be …


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Change network device name from eth1 back to eth0.

Posted on Wed 20 July 2011 in CentOS • Tagged with CentOS, network, Virtualization

The interface name of a network device increases if the mac address of the physical or virtual network card changes. A common case is if you made a clone of a virtual machine for example via VMware or KVM or replaced a physical network card in a non virtualized server …


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Install OpenERP on CentOS 6.0 with Nginx HTTP Proxy

Posted on Fri 15 July 2011 in CentOS • Tagged with CentOS, erp, howto, Nginx, openerp, tutorial

This tutorial should help you with the installation process of OpenERP on CentOS 6.x.

I installed OpenERP server and the OpenERP webgui with a nginx http proxy on a CentOS 6.0.

First of all I installed minmal CentOS 6.0.

Login as root and process the following steps …


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CentOS 6 is out

Posted on Mon 11 July 2011 in CentOS • Tagged with CentOS

8 month after RHEL 6 was released the free clone CentOS 6 is released. It includes all new features and is binary compatible to Red Hats Enterprise Linux 6.

Based on Linux kernel 2.6.32 it includes for example PostgreSQL 8.4 and MySQL 5.1.

Like RedHat, the …


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Change default port of Jenkins on CentOS

Posted on Tue 14 June 2011 in CentOS • Tagged with CentOS, Jenkins

The Jenkins project provides a rpm installation repository for CentOS which installs Jenkins with some changed locations for configuration files.

If you want to change the default port for Jenkins you need to change the file /etc/sysconfig/jenkins

JENKINS_PORT="8080"

Change it to the port you want to use …


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Install PostgreSQL 8.4 on CentOS

Posted on Sun 15 May 2011 in PostgreSQL • Tagged with CentOS, PostgreSQL, tutorial

This tutorial explains a basic configuration using PostgreSQL and CentOS. For detailed information about configuration parameter please read the PostgreSQL documentation which is very good organized.

First thing you should do is updating your system to the last patch level. Be sure all the other installed software on this system …


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Multi ip configuration on CentOS

Posted on Sun 24 April 2011 in CentOS • Tagged with CentOS, network

In Linux you can add additional network IP's to a network interface with aliases.

Your first interface name looks something like etho. If you add more additional addresses your alias will look some thing like eth0:0 for the first one and eht0:1 for the second and so on …


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