Ubuntu

Today I will be talking about ansible, a powerful configuration management solution written in python. There are many configuration management solutions available, all with pros and cons, ansible stands apart from many of them for its simplicity. What makes ansible different than many of the most popular configuration management systems is that its agent-less, no need to setup agents on every node you want to control. Plus, this has the benefit of being able to control you entire infrastructure from more than one place, if needed. That last point’s validity, of being a benefit, may be debatable but I find it as a positive in most cases. Enough talk, lets get started with Ansible installation and configuration on a RHEL/CentOS, and Debian/Ubuntu based systems.

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Ubuntu Linux version 14.04 LTS (code named “Trusty Tahr”) has been released and available for download. Ubuntu Linux is a community-based Linux distribution. The latest release of Ubuntu brings the best open source technologies together on one platform, with the benefit of free updates for 5 years. This latest release of Ubuntu Server is heavily focused on supporting cloud computing, mobile phones & tables, 64-bit ARM-based microservers support, and more.

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If you want to monitor network throughput on the command line interface, use nload application. It is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in and outgoing traffic using two graphs and provides additional info like total amount of transferred data and min/max network usage.

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The first-person shooter Half-Life 2 released for Steam on Linux. I truly enjoyed Counter Strike, and I am going to install Half-Life 2 this weekend.

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nicstat-welcomeThe nicstat command is top like utility for network interface card (NIC). It displays information and statistics about all your network card such as packets, kilobytes per second, average packet sizes and more. It works under Solaris and Linux operating systems.

In this post, I will explain how to install and use the nicstat command to find out stats about your NICs under Debian / Ubuntu / RHEL / CentOS Linux operating systems.

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A typical Wordpress blog contains a mix of static stuff such as images, javascript, style sheets and dynamic content such as posts, pages and comments posted by users. You can speed up your blog by serving static content via content delivery network such as Akamai, Edgecast and so on. The big boys of CDN business also offered the solution to accelerate dynamic content to improve the performance and reliability of the blog. However, solutions offered by big and traditional CDNs are expensive. Amazon cloudfront recently started to serving dynamic content at lowered price. In this blog post, I will explain:

  1. How to serve your entire blog using cloudfront.
  2. DNS settings.
  3. Wordpress settings.
  4. Documenting limitations of cloudfront.
  5. Documenting performance improvements.

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Goldendict is a cross-platform (Linux/Unix/MS-Windows/Apple OS X) and dictionary lookup app written in QT. This application support of multiple dictionary file formats. The program can search Wikipedia, Wiktionary, or any other MediaWiki based sites to perform lookups. You can listen to pronunciations for any word or setup text to speech to read out pronunciations. The dictionary also provides word stemming and spelling suggestions. You can also use this program to find out translations of words and phrases for different languages. A commercial mobile version is also available for Android based devices.

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Nmap is short for Network Mapper. It is an open source security tool for network exploration, security scanning and auditing. However, nmap command comes with lots of options that can make the utility more robust and difficult to follow for new users.

The purpose of this post is to introduce a user to the nmap command line tool to scan a host and/or network, so to find out the possible vulnerable points in the hosts. You will also learn how to use Nmap for offensive and defensive purposes.

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Shutter is a free, open-source, and feature-rich screenshot tool for GNU/Linux distributions. I use this tool frequently when I am creating resources for this site or for our youtube channel and it has not yet let me down.

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Everything is a file under Linux and ls* and friends can help you to dig out more information from the system than you originally thought.

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