Tech Chorus

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 http://download.fedora.redhat.com/pub/epel/6/i386/epel-release-6-5.noarch.rpm

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:

mysql_secure_installation

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;

Amazon Simple Storage Service or Amazon S3 is a storage service with a web API. I use Amazon S3 to store backups of my blog and other sites. I made a simple python script to handle file uploads to S3.

In order to use Amazon S3, first create a bucket using your Amazon AWS account. As the name suggests, bucket is a container. You can create buckets using the AWS management console.

The script we're going to write will take two input parameters

1. Path to file, local
2. Target S3 path

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:

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.5.1-1.el5.rf.i386.rpm

For 64 bit machines use these commands:

wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm
rpm -ivh rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm

Installing And Configuring Nagios

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 http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm

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.

Let us get started. Are you ready?

In the previous articles I've written about using Dojo date pickers and filteringSelect widgets.

The Zend Framework 1.9 release added a new feature - Zend_Rest_Controller. Zend_Rest_Controller and Zend_Rest_Route classes go hand in hand. In the previous versions of the Zend Framework, we have had the Zend_Rest_Server component. We still have. Since Zend_Rest_Server provides an RPC like component violating the REST architectural constraint, it is likely to be deprecated in the future versions of the Zend Framework.

What's the problem with PHP's mail() function?

PHP language provides the mail() function. But it requires properly configured mail server on the local machine. Developers often don't have the necessary infrastructure at their disposal. Sometimes sending emails from a PHP script becomes a frustrating experience.

If you are a

• PHP programmer looking to write a script to send changelog email notification when a commit is made to the SVN server
• SVN server admin looking for a script to send changelog email notification when a commit is made

you have come to the right place.

For the impatient, the script is posted at the end of the article.

Before we delve into writing the script, let us summarize the environment.

• We have our SVN project at the path /var/svn/myproject/
• The project name is myproject

Exploring svnlook

So, you want to set up an SVN server instantly?

If you are reading this post you already know what is SVN. If you don' I recommend you to read

http://subversion.tigris.org/ and
http://en.wikipedia.org/wiki/Subversion_%28software%29

There is also a free and excellent book on subversion at http://svnbook.red-bean.com/

In this article we will quickly set up an SVN server and also demonstrate how to use it.

First and foremost, make sure you have subversion installed on your server and client.

yum install subversion