The Geek Stuff

How to Install AMQP PHP Extension and RabbitMQ Client on Linux

Ramesh Natarajan — Fri, 17 May 2013 12:00:06 +0000

To connect to RabbitMQ message queue server, you can write your client program using various programming languages. Currently you can write client using C#, erlang, java, perl, PHP, python, and ruby. This tutorial explains how to install and configure RabbitMQ client library and AMQP PHP extension. Once you get AMQP PHP extension installed, you can [...]

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How Email Works? – Email Basic Concepts Explained

Himanshu Arora — Tue, 14 May 2013 12:00:56 +0000

From an email client, you’ll typically compose a message, attach any necessary files, and send it to the recipient. But, have you wondered what happens behind the scenes? How the email is sent from your outbox to the recipients inbox? In this article, we will explain the basis of email. For those who already know [...]

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How to Use C++ Reference Variables (C++ Reference Vs Pointer Example)

Himanshu Arora — Fri, 10 May 2013 12:00:22 +0000

The concept of references in C++ is simple, interesting and useful to programmers. It adds value to C++ when compared with C. Though the debate between the followers of C and C++ will always be there but I personally think that both the languages have little overlapping area of usage. When compared to C, C++ [...]

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Python Dictionary Examples – Create, Update and Delete Elements

Himanshu Arora — Thu, 09 May 2013 12:00:16 +0000

Dictionary in python consists of keys and their values. This article is part of our ongoing series on python. In the first article of the series, we explained how to use variables, strings and functions in python. In this tutorial, we’ll understand the basics of python dictionaries with examples. 1. Create a Python Dictionary Here [...]

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Linux AuFS Examples: Another Union File System Tutorial (UnionFS Implementation)

Lakshmanan Ganapathy — Wed, 08 May 2013 12:00:42 +0000

AuFS stands for Another Union File System. AuFS started as an implementation of UnionFS Union File System. An union filesystem takes an existing filesystem and transparently overlays it on a newer filesystem. It allows files and directories of separate filesystem to co-exist under a single roof. AuFS can merge several directories and provide a single [...]

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What is IP Multicasting? Concept of IP Multicast Address Explained

Himanshu Arora — Wed, 01 May 2013 12:00:08 +0000

IP multi-casting is a communication mechanism in which data is communicated from server to a set of clients who are interested in receiving that data. Any client can dynamically enter or leave the communication. Though the overall concept seems very simple but the way it is implemented requires good understanding. So, in this tutorial we [...]

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12 Linux Which Command, Whatis Command, Whereis Command Examples

Himanshu Arora — Tue, 23 Apr 2013 12:00:20 +0000

This Linux tutorial will explain the three “W” commands. The three “W”s are whatis, whereis and which commands. You already know how to use find command to efficiently fo find a file. Now, these three W commands will help you to locate more stuff from Linux command line. I. Linux whatis Command Whatis command is [...]

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How to Install RabbitMQ Server and Erlang on Linux

Ramesh Natarajan — Fri, 19 Apr 2013 12:00:06 +0000

RabbitMQ is an open source message queue server that you can use to build your messaging applications. In simple terms, you can put a message to the queue from one application, and retrieve the message from the queue from the same application, or from a different application. You can use wide varieties of programming languages [...]

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How to Use C Macros and C Inline Functions with C Code Examples

Himanshu Arora — Wed, 17 Apr 2013 12:00:02 +0000

Many C and C++ programming beginners tend to confuse between the concept of macros and Inline functions. Often the difference between the two is also asked in C interviews. In this tutorial we intend to cover the basics of these two concepts along with working code samples. 1. The Concept of C Macros Macros are [...]

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10 Cat Command Examples to Manage Files in Linux / UNIX

Balakrishnan Mariyappan — Tue, 16 Apr 2013 12:00:26 +0000

Cat command is one of the basic commands that you learned when you started in the Unix / Linux world. You already know that cat displays a file content. What more could this command do? This tutorial gives 10 practical usage examples for cat command. Probably few of these examples could be new to you. [...]

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