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Network simulators are tools used to simulate discrete events in a network and which helps to predict the behaviours of a computer network. Generally the simulated networks have entities like links, switches, hubs, applications, etc. Once the simulation model is complete, it is executed to analyse the performance. Administrators can then customize the simulator to suit their needs. Network simulators typically come with support for the most popular protocols and networks in use today, such as WLAN,UDP,TCP,IP, WAN, etc.

When we first open sourced Spark, we aimed to provide a simple API for distributed data processing in general-purpose programming languages (Java, Python, Scala). Spark enabled distributed data processing through functional transformations on distributed collections of data (RDDs). This was an incredibly powerful API—tasks that used to take thousands of lines of code to express could be reduced to dozens. read more

Imagination is hosting a raffle for a 9.7-inch, MIPS-based Ingenic tablet that runs a MIPS port of Firefox OS, which will also support its Creator C120 SBC.

Collabora, a leading contributor to the popular LibreOffice productivity application, has partnered with IceWarp, the provider of global messaging and collaboration solutions, to jointly develop web-based document editing technology and contribute these to the thriving Free Software community around LibreOffice.

It's been years since The Document Foundation announced that LibreOffice would be ported to an online version. It looks like it will finally arrive... in 2016.

Fedora is a big project, and it’s hard to keep up with everything. This series highlights interesting happenings in five different areas every week. It isn’t comprehensive news coverage — just quick summaries with links to each. Here are the five things for March 25th, 2015.

Human rights NGO Amnesty International, a movement of more than seven million people, released its Annual Report for 2014-15 at the end of February. This 500+ page print book is published simultaneously in English, French, Spanish, and Arabic, and translated into 12 other languages by local teams. It is composed of 160 detailed chapters written by regional experts on the human rights situation in most of the countries of the world. read more

I can’t recall the exact time I learned about open source software, but I can certainly narrow down the place. I quickly realized how transformative it could be. In 1996, I was sitting in the tech support department of a large ISP that provided hosting and connectivity to the Fortune 1000. Most of our servers ran Solaris, floppy disks arrived via snail mail, and we applied security updates manually adhering to a regime of updates and invoices prescribed by Sun Microsystems. It was a huge change from my university career of dumb terminals and mainframes.

After my project to control my Christmas Tree lights with my Raspberry Pi, what would be my next project? I eventually landed on tinkering with Pi Musicbox, a spin of Raspbian with Mopidy that allows users to play all sorts of streaming services—like Spotify, TuneIn, SoundCloud—and local sound files on a 'headless' Raspberry Pi. In this guide, I'll show a bit of the work I had to do to get Pi MusicBox working to my satisfaction as well as some of the issues I'm still dealing with. read more

Many Linux admins rely on a centralized remote monitoring system (e.g., Nagios or Cacti) to check the health of their network infrastructure. While centralized monitoring makes an admin's life easy when dealing with many hosts and devices, a dedicated monitoring box obviously becomes a single point of failure; if the monitoring box goes down or […]Continue reading... The post How to set up server monitoring system with Monit appeared first on Xmodulo. Related FAQs: How to monitor Linux servers with SNMP and Cacti How to install and configure Nagios on Linux How to configure Nagios for audio alerts and mobile notifications How to monitor and troubleshoot a Linux server using sysdig How to set up a cross-platform backup server on Linux with BackupPC

Rethink Robotics’s one-armed, Linux- and ROS-based “Sawyer” manipulation robot is smaller, faster, stronger, and more precise than the earlier Baxter. When MIT spinoff Rethink Robotics announced the $25,000+ Baxter manipulation robot in 2012, it inspired a whole new category of small, relatively low-cost robots for light manufacturing and product assembly. The fixed, two-armed, “collaborative” robot […]

When it comes to picking a programming language to use when teaching people how to program, there are many, many options. Scratch is a good choice when teaching the basics because of its drag and drop building block method of programming. Python or Ruby are also good choices—both languages have a straight-forward syntax, are used in major real-world projects, and have excellent communities and supplemental projects built around them. Or there is Java, Objective-C, and C#, which are solid programming languages and marketable job skills. Honestly, they are all good choices, but when it comes to teaching programming in an academic setting, are they really the best way to go about doing it? read more

Variscite released a tiny “VAR-SOM-DUAL” module starting at $46 that runs Android or Linux on a Freescale i.MX6 Dual, and offers onboard WiFi and Bluetooth.

Tue, 24 Mar 2015. Today KDE releases a bugfix update to Plasma 5, versioned 5.2.2. Plasma 5.2 was released in January with many feature refinements and new modules to complete the desktop experience.

Spurred on by IoT, open source Linux will grow from a 56.2 percent share of embedded device shipments in 2012 to 64.7 percent in 2017, says VDC Research.

Cyanogen, a venture-funded startup, is offering a new open-source version of Android that it hopes a significant number of mobile device makers will adopt as an alternative to the ubiquitous Google brand. This slide show covers the key features of Cyanogen OS and examines why this new version of Android may draw more attention in the coming months.

This tutorial explains the installation and usage of X2Go on Ubuntu. X2Go is a remote desktop application to access X-Desktop enviroments over a network connection, it is well suited for low bandwidth connections, has support for sound with PulseAudio and allows desktop sharing. The application has two parts, the x2goclient for the client side and x2goserver (which has to be installed on the desktop system that shall be accessed). The X2Go client software is available for Windows, Mac OS X and Linux.

The OpenStack project feels different from other open source projects to me. Let me try to explain. read more

Networking focused distros get an update.

Some of my recent articles have been about the Linux philosophy and its impact on the daily activities of system administrators like myself. One of the basic tenets of the Linux philosophy is to use software leverage, and one of the important corollaries of that tenet is to automate everything. read more