Protesters with "Yes we scan" sign
A new story published on the German site Tagesschau and followed up by BoingBoing and DasErste.de has uncovered some shocking details about who
I don't know how many readers know this, but my very first Linux Journal column ("Browse the Web without a Trace", January 2008) was about how to set up and use Tor. Anonymity and privacy on the...
Tails logo
A few columns ago, I started a series aimed at helping everyone improve their privacy and security on the Internet. The first column in this series was an updated version of a Tor column I wrote a...

Image Manipulation with ImageMagick

I've spent a lot of time in my column talking about text processing and analysis, with the basic assumption that if you're using the command line, you're focused on text. more>>

Non-Linux FOSS: Angry IP

The de facto standard for port scanning always has been the venerable Nmap program. The command-line tool is indeed very powerful, but I've only ever seen it work with Linux, and every time I use it, I need to read the man page to figure out the command flags. more>>

Encrypting Your Cat Photos

The truth is, I really don't have anything on my hard drive that I would be upset over someone seeing. I have some cat photos. I have a few text files with ideas for future books and/or short stories, and a couple half-written starts to NaNoWriMo novels. It would be easy to say that there's no point encrypting my hard drive, because I have nothing to hide. more>>

Numerical Python

For the past few months, I've been covering different software packages for scientific computations. For my next several articles, I'm going to be focusing on using Python to come up with your own algorithms for your scientific problems. more>>

Speed Test for Nerds

Most people with Internet access in their houses have visited a speed-test Web site to make sure they're getting somewhere close to the speed they're overpaying for. I'm paying more than $100 a month for my business-class connection from Charter, so on a regular basis, I make sure I'm getting the advertised speed. more>>

DNSSEC Part II: the Implementation

This article is the second in a series on DNSSEC. In the first one, I gave a general overview of DNSSEC concepts to lay the foundation for this article, which discusses how to enable DNSSEC for a zone using BIND. more>>

Pro Video Editing with Pitivi

Several decent video editors are available on the Linux platform. Kdenlive, OpenShot, Cinelerra and Pitivi are those that come to mind as "big players" in an admittedly small market. I've used them all through the years, with varying levels of success. more>>

Android Candy: Control-Z for Your Phone!

I never have a Twitter app crash in the middle of a Tweet. That wouldn't be too terrible to deal with. No, for me, it seems my e-mail application decides to crash after I've spent 20 minutes thumbing out a reply while sitting in a crowded airport. If you've ever lost a love letter, term paper, shopping list or world-class Facebook post, Type Machine is the perfect app for you. more>>

Opening Minds to the Spheres Among Us

Flatland, an 1880 novella by Edwin A. Abbott, is about a world with just two dimensions, inhabited by lines and polygons. Trouble starts when a sphere shows up. more>>

April 2014 Issue of Linux Journal: High Performance Computing

Big Block Linux with a Four-Barrel Hemi

We often brag about how few resources Linux needs to operate: a Raspberry Pi or Beagle Board, in a Web browser (

More Secure SSH Connections

If you need remote access to a machine, you'll probably use SSH, and for a good reason. The secure shell protocol uses modern cryptography methods to provide privacy and confidentiality, even over an unsecured, unsafe network, such as the Internet. more>>

Split Testing

It's nice to have many people visit your Web site. It's even better when people don't just come to your site, but also enjoy your content. But, best of all is when visitors to your site do what you would like them to do—sign up for your newsletter, register for your SaaS application or buy one of your products. more>>

LVM, Demystified

I've been a sysadmin for a long time, and part of being a sysadmin is doing more than is humanly possible. Sometimes that means writing wicked cool scripts, sometimes it means working late, and sometimes it means learning to say no. Unfortunately, it also sometimes means cutting corners. I confess, I've been "that guy" more than once. A good example is SELinux. more>>

Encrypted Backup Solution "Home Paranoia Edition"

How to safeguard your personal data with TrueCrypt and SpiderOak. more>>

A Shining Ruby in Production Environments

Even the most beautiful Rails application can lose its elegance if not deployed correctly. Like other Ruby frameworks or languages, such as Sinatra, Rails is based on the Rack interface. This article provides a basic introduction to Rack hosting and Rack-based application deployments. more>>

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