For those who seek help in different areas of software and hardware platform.

How To Install Zentyal on Ubuntu 14.04

Most businesses require several server types such as file servers, print servers, email servers, etc. Zentyal combines these services and more, as a complete small business server for Linux.

Zentyal servers are simple to use because of the Graphical User Interface (GUI). The GUI provides an easy and intuitive interface for use by novice and experienced administrators alike. Command-line administration is available, too. We'll be showing how to use both of these methods in this tutorial.

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Play Your Android Games and Videos on the TV with Google Chromecast

There’s a lot you can do with the Google Chromecast but did you know you can cast your screen from your Android phone or tablet to any Chromecast-equipped display? It’s easy, and we’re going to tell you how to do it. The Google Chromecast rocks. It’s cheap ($35), tiny, and there’s so much you can do with it. If that’s not enough to convince you, then we urge you to check out our Chromecast review!

We’ve told you already how to cast any video from your desktop or laptop to your Chromecast. In this article we will show you now how to cast your Android device’s (phone or tablet) screen to your TV. Before you can cast, you need to make sure your device is ready.

How to Optimize Your Android Phone’s Battery Life Using Greenify

Using Smartphones as daily drivers for calls, web browsing, taking pictures, using social media, and keeping in touch with friends and family. With the disparity of battery capacities on Android devices, Apps like “Greenfly” can maximize battery life throughout the day.

Mirror Anything from Your Computer to Your TV Using Google Chromecast

Outputting your computer to your HDTV via HDMI works well. Unfortunately, your computer’s location depends upon the length of your cable. With Google Chromecast, however, you can literally mirror any browser tab or even your desktop, from anywhere, in just a few clicks.

The point when video card manufacturers started including HDMI outputs was a great moment. Similarly, when TV makers began adding VGA inputs, we had yet another great way to add a huge second (or third) display to our setups. The implications, beyond the logical I-can-project-my-computer-now train of thought were pretty apparent. If you wanted to use your TV now to play games from your computer, or watch movies on a big screen, you could now do so easily and cheaply.

How to Install and Configure VNC on Ubuntu 14.04

VNC, or "Virtual Network Computing", is a connection system that allows you to use your keyboard and mouse to interact with a graphical desktop environment on a remote server. VNC makes managing files, software, and settings on a remote server easier for users who are not yet comfortable with working with the command line.

In this article, we will be setting up VNC on an Ubuntu 14.04 server and connecting to it securely through an SSH tunnel. The VNC server we will be using is TightVNC, a fast and lightweight remote control package. This choice will ensure that our VNC connection will be smooth and stable even on slower Internet connections.

Download link for All Versions of VMware vSphere Client

Download link of all versions of vSphere Client starting from vSphere Client v4.1 Update 1 to the latest release vSphere Client v5.5 Update 2. Just click on the vSphere Client Image in the below table to directly download the respective vSphere Client version.

How to Jailbreak iOS 8.1 – iOS 8 using Pangu

To everyone’s surprise, and as we reported first, the Pangu jailbreak for iOS 8 and iOS 8.1 was released earlier today courtesy of a mysterious team of Chinese jailbreak developers.

Some important points before you proceed:

How To Create a Puppet Module To Automate WordPress Installation on Ubuntu 14.04

Puppet is a configuration management tool that system administrators use to automate the processes involved in maintaining a company's IT infrastructure. Writing individual Puppet manifest files is sufficient for automating simple tasks.

However, when you have an entire workflow to automate, it is ideal to create and use a Puppet module instead. A Puppet module is just a collection of manifests along with files that those manifests require, neatly bundled into a reusable and shareable package.

WordPress is a very popular blogging platform. As an administrator, you might find yourself installing WordPress and its dependencies (Apache, PHP, and MySQL) very often. This installation process is a good candidate for automation, and today we create a Puppet module that does just that.

How to Enable Guided Access On Your iPad or iPhone For Kids

iPads and iPhones give you control over how your kids can use your devices. You can quickly lock your device to a certain app before handing it over or lock down an entire device with comprehensive parental controls.

These features are named Guided Access and Restrictions, respectively. Guided Access is ideal for temporarily handing your iPad or iPhone to a kid, while Restrictions are ideal for locking down a device your kids use all the time.

How To Configure SSH Key-Based Authentication on a Linux Server

SSH, or secure shell, is an encrypted protocol used to administer and communicate with servers. When working with a Linux server, chances are, you will spend most of your time in a terminal session connected to your server through SSH.

While there are a few different ways of logging into an SSH server, in this guide, we'll focus on setting up SSH keys. SSH keys provide an easy, yet extremely secure way of logging into your server. For this reason, this is the method we recommend for all users.

SSH Essentials: Working with SSH Servers, Clients, and Keys

SSH is a secure protocol used as the primary means of connecting to Linux servers remotely. It provides a text-based interface by spawning a remote shell. After connecting, all commands you type in your local terminal are sent to the remote server and executed there.

In this cheat sheet-style article, we will cover some common ways of connecting with SSH to achieve your objectives. This can be used as a quick reference when you need to know how to do connect to or configure your server in different ways.

How To Protect your Server Against the POODLE SSLv3 Vulnerability

On October 14th, 2014, a vulnerability in version 3 of the SSL encryption protocol was disclosed. This vulnerability, dubbed POODLE (Padding Oracle On Downgraded Legacy Encryption), allows an attacker to read information encrypted with this version of the protocol in plain text using a man-in-the-middle attack.

Although SSLv3 is an older version of the protocol which is mainly obsolete, many pieces of software still fall back on SSLv3 if better encryption options are not available. More importantly, it is possible for an attacker to force SSLv3 connections if it is an available alternative for both participants attempting a connection.

The POODLE vulnerability affects any services or clients that make it possible to communicate using SSLv3. Because this is a flaw with the protocol design, and not an implementation issue, every piece of software that uses SSLv3 is vulnerable.

How to Identify Network Vilification with Wireshark

Whether you’re looking for peer-to-peer traffic on your network or just want to see what websites a specific IP address is accessing, Wireshark can work for you.


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How To Set Up a Mirror Director with MirrorBrain on Ubuntu 14.04

Mirroring is a way of scaling a download site, so the download load can be spread across many servers in many parts of the world. Mirrors host copies of the files and are managed by a mirror director. A mirror director is the center of any mirror system. It is responsible for directing traffic to the closest appropriate mirror so users can download more quickly.

Mirroring is a unique system with its own advantages and disadvantages. Unlike a DNS based system, mirroring is more much more flexible. There is no need to wait for DNS or even to trust the mirroring server (the mirror director can scan the mirror to check its validity and completeness). This is one reason many open source projects use mirrors to harness the generosity of ISPs and server owners to take the load off the open source project's own servers for downloads.

How To Measure MySQL Query Performance with mysqlslap

MySQL comes with a handy little diagnostic tool called mysqlslap that's been around since version 5.1.4. It's a benchmarking tool that can help DBAs and developers load test their database servers.

mysqlslap can emulate a large number of client connections hitting the database server at the same time. The load testing parameters are fully configurable and the results from different test runs can be used to fine-tune database design or hardware resources.

In this article we will learn how to use mysqlslap to load test a MySQL database with some basic queries and see how benchmarking can help us fine-tune those queries. After some basic demonstrations, we will run through a fairly realistic test scenario where we create a copy of an existing database for testing, glean queries from a log, and run the test from a script.

Video Tutorials