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How to replace Shorewall with FirewallD on ROSA Desktop Fresh R4

How to replace Shorewall with FirewallD on ROSA Desktop Fresh R4

Shorewall is the default firewall application on ROSA Desktop Fresh R4, the latest edition of ROSA Desktop. See ROSA Desktop Fresh R4 KDE review. This tutorial show how to replace it with FirewallD, a firewall application with support for network zones (also IP zones). FirewallD comes with a command line client (firewall-cmd), a graphical interface firewall-config and an applet appropriately […]

Why I switched from Postgres to MongoDB, then to Neo4j

Why I switched from Postgres to MongoDB, then to Neo4j

When you’re about to start a project and are trying to make a decision on the what applications to use, one way to proceed is to find out what other people have to say about the available options, especially from others with first-hand experience with those available options. That’s the most prudent way. The other way, of course, is to […]

Debugging a failed Ansible ad hoc command

Debugging a failed Ansible ad hoc command

Ansible is an IT automation and configuration management tool. Of all the most popular Free Software applications of its kind, it is the only one that operates in agentless mode. Chef, CFEngine and Puppet need agents on the client nodes to function. Ansible operates via SSH, so you don’t need to install any code on the client nodes. A few […]

Data and Goliath: Digital surveillance and what you can do about it

Data and Goliath: Digital surveillance and what you can do about it

Data and Goliath is the title of a soon-to-be published book by Bruce Schneier, a well-known figure in cryptography and currently the Chief Technology Officer of Co3 Systems, a fellow at Harvard’s Berkman Center, and a board member of the Electronic Frontier Foundation (EFF). Data and Goliath is about digital surveillance, its scope, implications and what you can do about […]

The best Markdown editors for Linux

The best Markdown editors for Linux

During my search for a good Markdown editor for Linux, I came across a few that are good and a few that are not that good. See The search for a usable Markdown editor for my Linux desktop. A few of those don’t have support for binary installation on RPM-based distributions, like Fedora, and attempts to install them using alien […]

The pain of trying to install a .deb package on Fedora using Alien

The pain of trying to install a .deb package on Fedora using Alien

During my search for a good Markdown text editor for Linux, I came across a few that had binary installation only for Debian and Ubuntu distributions. See The search for a usable Markdown editor for my Linux desktop. Because my main Linux desktop is powered for Fedora, I decided to find an alternate method of installing those applications other than […]

The search for a usable Markdown editor for my Linux desktop

The search for a usable Markdown editor for my Linux desktop

I’ve spent the last several days looking for a note-taking/journal application that’s easy-to-use and also feature-rich. I’ve tried Lifeograph, RedNotebook and Xournal, but they didn’t fit the bill. I actually lost data with Lifeograph, which was painful. However, life goes on. So I went looking for something more to my liking. Something that’s Markdown-enabled. That has meant installing and uninstalling […]

TokuMX 2.0 released

TokuMX 2.0 released

TokuMX is a MongoDB distribution from TokuTek, a company headquartered in Lexington, Massachusetts (USA). TokuMX is a drop-in replacement for MongoDB, the most popular NoSQL database. It is to MongoDB what MariaDB is to MySQL. TokuMX is said to offer 50x performance improvements and 90% reduction in database size over MongoDB. And it has support for ACID transactions and multi-version […]

Aeromobil: It’s a car and it can fly

Aeromobil: It’s a car and it can fly

The video I’m posting in this article has been out since March, but it’s never too late to post an article on something like this. It’s about Aeromobil, a protoype flying car from Aeromobil, a company in Slovakia. It’s a 2-sitter and looks really nice and sleek. It can ride like a regular car and fly like a small plane, […]

ARM announces free mbed OS and mbed Device Server for IoT devices

ARM announces free mbed OS and mbed Device Server for IoT devices

ARM has announced an mbed device platform to promote development on Internet of Things (IoT) devices. Called the ARM mbed™ IoT Device Platform, it includes the mbed OS, a free operating system for ARM Cortex®-M processor-based devices, and mbed Device Server, designed to “provides the required server-side technologies to connect and manage devices in a secure way.” ARM Cortex-M processors […]

Honda Connect in-vehicle infotainment system has Tegra inside and runs Android

Honda Connect in-vehicle infotainment system has Tegra inside and runs Android

Honda Connect is an in-vehicle infotainment system built on a Tegra processor and runs Android, specifically, Android 4.0.4 Ice Cream Sandwich. It is, according to NVIDIA, the “first infotainment system using embedded Android as the operating system running on Tegra.” According to the NVIDIA blog post announcing the device, Honda Connect: … will deliver a touchscreen experience that’s much like […]

The future is encrypted, but your government says that’s not good

The future is encrypted, but your government says that’s not good

On the same day that an article titled Security and Privacy on the Encrypted Network: The Future is Encrypted was published by an information security research and advisory firm called Securosis, Eric Holder, the U.S. Attorney General, was criticizing technology companies for making it more difficult for law enforcement agencies to track and prosecute criminals. That was a not-very-subtle dig […]

Interesting articles on Data Science, and a cool image

Interesting articles on Data Science, and a cool image

Data Science and cool graphics. I’ve always loved cool, eye-catching graphics. Who doesn’t? Data Science? That’s the hottest field in the job market right now. And I think will remain so for as long as data remains currency. I guess that’s why I’ve been retraining myself to become a Data Science person. So put those two together and you’ve got […]

Adobe Photoshop now available for Chromebooks, but…

Adobe Photoshop now available for Chromebooks, but…

In partnership with Google, Adobe is now offering Photoshop, its flagship photo-editing software, on Chromebooks. But, and there is a but, that does not mean that all Chromebook owners/users will have access to Photoshop right now. More on that in a bit… Access to Photoshop, for the lucky chromebookers, will be via Adobe’s Creative Cloud program, a fee-based membership program […]

Mark Shuttleworth on Western media, Iraq, IS and Ukraine

It’s very rare that the CEO of a technology outfit that’s based in the West takes an open stance on hot-button geopolitical issues. It’s even rarer that that position is (somewhat) counter to generally held opinion in the West. But that’s what Mark Shuttleworth has done. Remember Mark Shuttleworth? He’s the founder of Canonical, the company behind a very popular […]

Using GNOME Boxes to create and access local virtual systems on GNOME 3.14

Using GNOME Boxes to create and access local virtual systems on GNOME 3.14

GNOME Boxes is a native GNOME 3 application for accessing remote machines and local virtual systems, primarily using the libvirt technology. Consider it an alternative to VirtualBox and VMPlayer. It’s being a usable application for quite some time, but with the release of GNOME 3.14, I decided to give it a test drive to see how far it has come. […]

How to install TwitteR, a Twitter client for R

How to install TwitteR, a Twitter client for R

Installing packages in R is pretty easy, if you know the name of the package you wish to install. Just pass the name of the package to the install.packages() function. Once that’s done, load the package by passing its name to the library() function. So it’s a fairly easy and straight-forward process, right? But it wasn’t so when I attempted […]

Patched Bash still vulnerable to Shellshock

Patched Bash still vulnerable to Shellshock

The bug that was discovered and patched in the Bash shell is still vulnerable to code injection attacks. And the latest is that the bug, now officially known as Shellshock, is being exploited by a computer worm. But nobody seems to know the extent to which the attacks have been successful. The problem with Shellshock, is that many of the […]

Bash susceptible to environment variables code injection attack

Bash susceptible to environment variables code injection attack

A security adversary posted at Red Hat’s security blog and referenced at US-CERT has warned users of the Bash shell of a “specially-crafted environment variables code injection attack.” That means UNIX-based operating systems that use the Bash shell are affected. That includes all Linux distributions and Apple’s Mac OS X. According to the blog post cited above: … the vulnerability […]

DevAssistant: A developer’s best friend

DevAssistant: A developer’s best friend

One application I came across while testing an installation of the main edition Fedora 21 alpha is DevAssistant. (See Fedora 21 Workstation: GNOME 3. KDE and Anaconda screenshots.) DevAssistant automates the process of setting up development environments for a few of the most popular programming languages and development frameworks. Languages supported are shown in the screenshot below. Just after a […]