How to change the Swappiness of your Linux system

How to change the Swappiness of your Linux system

What is Swappiness?Most of Linux users that have installed a distribution before, must have noticed the existence of the “swap space” during the partitioning phase (it is usually found as /sda5). This is a dedicated space in your hard drive that is usually set to at least twice the capacity of your RAM, and along with it constitutes the total virtual memory of your system. From time to time, the Linux kernel utilizes this swap space by copying chunks from your RAM to the swap, allowing active processes that require more memory than it is physically available to run.Swappiness is the kernel par

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Raspberry Pi Basics: installing Raspbian and getting it up and running

Raspberry Pi Basics: installing Raspbian and getting it up and running

Raspberry Pi Basics: installing Raspbian and getting it up and runningSo, are you a person who got a Raspberry Pi (aka “Pi”) and want to start building something with it but don’t know how to go about it? If yes, then this tutorial is for you. Here in this howto, we go about installing the Raspbian OS and initiating a desktop environment.IntroductionRaspberry Pi is a credit card sized micro processor available in different models with different processing speed starting from 700 MHz. Whether you have a model B or model B+, or the very old version, the installation process remains the same. Peo

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HPL (High Performance Linpack): Benchmarking Raspberry PIs

HPL (High Performance Linpack): Benchmarking Raspberry PIsBenchmarking is the process of running some of the standard programs to evaluate the speed achieved by a system. There are a number of standard bechmarking programs and in this tutorial we benchmark the Linux system using a well known program called the HPL, also known as High Performance Linpack.IntroductionIn this tutorial we cover how to go about benchmarking a single processor system, the Raspberry Pi. First we will benchmark a single node, and then continue to benchmark multiple nodes, each node representing a Raspberry Pi. There a

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How to setup Raspberry Pi as Backup Server for Linux and Windows Desktops

How to setup Raspberry Pi as Backup Server for Linux and Windows Desktops

How to setup Raspberry Pi as Backup Server for Linux and Windows DesktopsThe Raspberry Pi is a series of small single-board computers. They are rather cheap and are well suited for running a backup server or voip server. In february 2015 the Raspberry Pi 2 was released. It has more ram, newer cpu and features 4 onboard USB ports.Current price for the Raspberry Pi 2 is $ 35.-. However in addition you need a few other things:microSD card: The Raspberry Pi 2 requires a microSD card to boot from. Any should do with 4GB or more. For the backup server 4GB should be plenty. You might want to get one

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How to install a Raspberry Pi SMS Server

How to install a Raspberry Pi SMS Server

How to install a Raspberry Pi SMS ServerBefore we startThis tutorial will show you how you can set up an SMS server on a Raspberry Pi 2 Model B, running Raspbian.We will use playsms and smstools. In my example, I have used a Huawei E3131 3G modem.RaspbianFirst we need to download raspbian, you can grab the latest version at https://www.raspberrypi.org/downloads/Direct url: http://downloads.raspberrypi.org/raspbian_latestNow we need unzip the file: 2015-05-05-raspbian-wheezy.zip:unzip 2015-05-05-raspbian-wheezy.zipYou will get a file named 2015-05-05-raspbian-wheezy.img, this file must be writt

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