Linux, GNU/Linux, GNU

How To Setup php-fpm And Nginx On CentOS 6

FPM, FastCGI Process Manager is a PHP FastCGI implementation. Using php-fpm you can have a website running as its own user instead of a common user like Apache or www-data. In this post, we will go through the process of installing and configuring php-fpm with Nginx on CentOS 6.

php-fpm package is available in the official CentOS repository. There is no need to enable third party repositories in order to use php-fpm.

nginx package is available in Fedora EPEL repository.

Enable Fedora EPEL.

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How To Setup MySQL Replication

In this tutorial, I will provide step by step process to setup MySQL replication. We will create one master and one slave. We will use two CentOS 6 servers - one for master and the other for slave. This following steps have been tested on two virtual machines.

Our master server will have IP address
Our slave server will have IP address

You might want to run SELinux in permissive mode.

Perform these steps on the master:

Install MySQL server.

yum install mysql-server -y

How To Install RapidSSL SSL Certificate - Nginx Server

In this article, I will describe how to use the SSL certificate provided by RapidSSL with Nginx server.

openssl is a command line tool to use various cryptography functions.

The req command of openssl provides PKCS#10 X.509 Certificate Signing Request (CSR) management facilities.

We will generate a new certificate request for the domain .

openssl req -new -nodes -keyout -out
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Installing Redmine With MySQL And Nginx On CentOS 6

Redmine is a software project management tool which has Wiki, issue tracer, source code browser and other cool features built in. If you want to install Redmine with MySQL and Nginx on CentOS 6, follow these steps.

I always use EPEL repository with CentOS. EPEL provides additional RPM packages. We can use Nginx and some Ruby gem packages from EPEL.

Enable EPEL:

rpm -Uvh

Install required packages:

yum install nginx mysql-server ruby rubygem-rack rubygem-rake ruby-mysql

Redmine requires a Ruby gem called i18n. I couldn't find the RPM for i18n gem. I had to install i18n gem using the gem installer.

gem install -v=0.4.2 i18n

Start MySQL server:

/etc/init.d/mysqld start

Use the MySQL secure installation program:


Connect to the MySQL server as root:

mysql -u root -p

Create a MySQL database and user for Redmine:
mysql> CREATE DATABASE redmine character set utf8;
mysql> GRANT ALL PRIVILEGES ON redmine.* TO 'redmine'@'localhost' IDENTIFIED BY 'secret_password' WITH GRANT OPTION;

Learning Nagios 3.0 - Book Review

Title: Learning Nagios 3.0
Publisher: Packt Publishing
Author: Wojciech Kocjan
ISBN-10: 1847195180
ISBN-13: 978-1847195180

Nagios is a powerful and popular network monitoring software. I contacted PackT and asked for a review copy of the book.

Read the full table of contents on the publisher's site.

The topic being system administration, I could read the book from cover to cover in three days.

Like many other technical books, introductory pages of Learning Nagios 3.0 sells you Nagios. The first chapter convinces you why you should use Nagios to make your life easier by setting up automated monitoring of your servers.

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How To Install And Configure Nagios On CentOS

Nagios is a popular networking monitoring software. Nagios lets you monitor your IT infrastructure, be it servers, routers, switches or other devices. In this post, I will walk you through the steps of installing and configuring a basic setup of Nagios on CentOS.

At the end of the tutorial you will be have a working Nagios setup to monitor

  • local disk space usage
  • local system load
  • an external website

Whenever there is a problem or recovery with any of the above, Nagios will alert you via email.

Unless you have a strong reason to compile Nagios yourself, you should use the binary packages available for your Linux distribution.

RPMForge provides packages that are not included in CentOS repositories. We will use the Nagios packages from RPMForge.

Enabling RPMForge repository

For 32 bit machines use these commands:

rpm -ivh rpmforge-release-0.5.1-1.el5.rf.i386.rpm

For 64 bit machines use these commands:

rpm -ivh rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm

Installing And Configuring Nagios

Event Report - Richard M Stallman Spoke At Reva Institute of Science and Management, Bangalore

The topic was Free Software Movement and GNU/Linux operating system.

It was a long drive to Reva Institute, 40 kilometers from home. I reached the venue in time thanks to the moderate traffic. The third floor was already filled. I had to go to the fourth floor to listen to the speech. The auditorium stage can be viewed from both third and fourth floor. The floor had two elevated blocks, one above the other. There were no chairs on the fourth floor. The floor was a bit dusty. Approximately five hundred people attended the event.
Richard Stallman

The talk was usual as you would expect. RMS started off, explaining the meaning of free software. The four freedoms. Then he talked about the history of the free software movement, FSF, GNU, Linux, Emacs. Even though I am quite familiar with the topics, it was interesting to hear them from the horse's mouth.

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Becoming Productive In Bash Using The Keyboard Shortcuts

Moving around

You can use the arrow keys on keyboard to move around in the command line. Bash also provides convenient keyboard short cuts to navigate effectively. Try them out and see for yourself.

To become a Bash pro user you have to get yourself familiar with the keyboard shortcuts. Once you do, you'll find yourself productive.

CTRL+b move backward one character
CTRL+f move forward one character
ESC+b move one word backward
ESC+f move one word forward
CTRL+a move to beginning of line
CTRL+e move to end of line
CTRL+p move to previous line
CTRL+n move to next line
ESC+ move to first line of history list
ESC+> move to last line of history list

Moving around words using ESC+f and ESC+b are my favourites in this list. Jumping to first and last lines of the history list is also useful.

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How To Get Broadcom BCM4312 Wireless To Work In Fedora

Broadcom provides Linux drivers for most of its wireless chipsets. Prior to the release of official drivers from Broadcom, the open source software community had various workarounds. Some people used Windows drivers through ndiswrapper. Others used fwcutter.

The RPM Fusion Repository for Fedora offers the Broadcom wireless drivers from its repositories. You can install them using yum.

Step 1: Enable the RPM Fusion repositories

rpm -Uvh

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How To Play Music And Video In Fedora

How to play music and video(MP3, MPEG, AVI, FLV and other multimedia files) in Fedora 12?

Due to patent encumbrance codecs required to play some proprietary file formats are not shipped with Fedora. Codecs are the programs that encode and decode digital data. These codecs are available in the rpmfusion repository for Fedora. You will be able to play mpeg, mp3, avi, flv and other commonly used file formats for music and video. You will require an Internet connection to download and install these packages on your computer.

video movie playing in gnome mplayer fedora 12 screenshot

Let us get started. Are you ready?

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