Linux consultant

[geek-kb]

Failed to connect to a windows service - no wifi fix

Failed to connect to a windows service – no wifi fix

So next time you are going to wake up and have windows taking longer time to boot, get a black screen for 3 minutes when finally loading your user and then get this worning from windows, saying that the computer failed to connect to a windows service like so:

wifi failure in windows

So next time you are going to wake up and have windows taking longer time to boot, get a black screen for 3 minutes…

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[geek-kb]

changing drupal encoding of database to utf-8

changing drupal encoding of database to utf-8

Using drupal 7 on mysql, I have found out that during one of the last site migration the encoding was changed.

How do I see what character set a MySQL database / table / column is?

Here’s how I’d do it –

For Schemas:

SELECT default_character_set_name FROM information_schema.SCHEMATA WHERE schema_name ="schemaname";

For Tables:

SELECT CCSA.character_set_name FROM information_schema.`TABLES`…

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[geek-kb]

How to: Install and Configure NTP server and clients

How to: Install and Configure NTP server and clients

NTP installation and configuration could get quite confusing, in this article I’m going to show you the correct way to the set up a Network Time Protocol server and how to configure NTP clients to work against it.

What is NTP?

Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks. In operation…

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[geek-kb]

How To: Install Puppet, Foreman and Passenger on CentOS 6.x

How To: Install Puppet, Foreman and Passenger on CentOS 6.x

In this article I will show you how to install Puppet, Foreman and Passenger on a CentOS 6.x machine.

The versions we are going to install are: Puppet: 3.8.x Foreman: 1.9 Passenger: 4.0.18

Requirements:

A Linux machine running CentOS 6.x and connected to the internet. An active DNS server in the network.

What is Puppet?

Puppet is an open-source configuration management utility. It runs on many…

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[geek-kb]

HowTo: Create a RabbitMQ Cluster on CentOS 6.x

HowTo: Create a RabbitMQ Cluster on CentOS 6.x

In this guide I’m going to show you how to create a RabbitMQ cluster of two or more RabbitMQ nodes.

Following my guide: http://geek-kb.com/install-configure-rabbitmq-centos-6x/ , I’ve created two RabbitMQ nodes and I’m going to join them into a cluster.

[root@geekkb_test_node2 ~]# hostname geekkb_test_node1 [root@geekkb_test_node1 ~]# hostname geekkb_test_node2

In order to create a cluster,…

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[geek-kb]

HowTo: Install and configure Rabbitmq on CentOS 6.x

HowTo: Install and configure Rabbitmq on CentOS 6.x

What is RabbitMQ?

RabbitMQ is open source message broker software (sometimes called message-oriented middleware) that implements the Advanced Message Queuing Protocol (AMQP). The RabbitMQ server is written in the Erlang programming language and is built on the Open Telecom Platform framework for clustering and failover. Client libraries to interface with the broker are available for all major…

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[geek-kb]

Nagios installation from source on CentOS/RHEL

Nagios installation from source on CentOS/RHEL

So what is Nagios?

Nagios is an open source computer system monitoring, network monitoring and infrastructure monitoring software application.

Nagios offers monitoring and alerting services for servers, switches, applications, and services.

It alerts the users when things go wrong and alerts them a second time when the problem has been resolved.

Requirements:

A CentOS/RHEL machine attached to the…

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[geek-kb]

How to add a ploop disk to an existing OpenVZ container

How to add a ploop disk to an existing OpenVZ container

Following my guide Open Virtuozzo [OpenVZ] installation manual for CentOS/RHEL, In this guide, I will teach you How to add a ploop device to an existing OpenVZ container.

Requirements:

A CentOS/RHEL machine installed with OpenVZ.

Let’s Begin:

Apart from the creation of the container_id.mount and container_id.umount files, where ever you see $VE_ID , replace it with your own Container’s id, for…

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[geek-kb]

Open Virtuozzo [OpenVZ] installation manual for CentOS/RHEL

Open Virtuozzo [OpenVZ] installation manual for CentOS/RHEL

In this article I will teach you how to install OpenVZ on CentOS/RHEL machines.

What is OpenVZ?

OpenVZ (Open Virtuozzo) is an operating system-level virtualization technology based on the Linux kernel and operating system.

OpenVZ allows a physical server to run multiple isolated operating system instances, called containers, virtual private servers (VPSs),

or virtual environments (VEs).

OpenVZ is…

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[geek-kb]

NRPE Installation and Configuration on CentOS/RHEL

NRPE Installation and Configuration on CentOS/RHEL

Requirements:

A Linux machine connected to the internet.

Optional Requirement:

A Linux machine running Nagios server (needed for running checks)

What is NRPE?

NRPE stands for Nagios Remote Plugin Executor.

It’s a Nagios agent that allows remote system monitoring using scripts that are hosted on the remote systems.

It allows for monitoring of resources such as disk usage, system load or the number…

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[geek-kb]

The Heartbleed Bug Recently, a serious vulnerability has been discovered in the very popular OpenSSL cryptographic software library known as the heartbleed bug.

[geek-kb]

How To: Set a static route in CentOS/RHEL 6.x

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