How to install Firefox 49 on Linux Mint, Ubuntu, Debian, CentOS, Fedora…

… or any other Linux distribution. This how-to explains how to install Firefox 49 on Linux, with or without replacing an existing Firefox installation. Firefox 49 was released on September 20, 2016. Firefox 50 will be released on November 8, 2016. More information on Firefox release dates (including beta, aurora, nightly and ESR versions) can […]

How to install LibreOffice 5.2 on Linux Mint, Ubuntu, Xubuntu, Debian…

This article describes how to install LibreOffice 5.2 or 5.3 on Debian-based / Ubuntu-based Linux distributions, such as Linux Mint, Xubuntu, Kubuntu, Debian and Ubuntu. This installation method is based on the official .deb packages. LibreOffice 5.2 was released on August 3, 2016. LibreOffice 5.3 is scheduled to be released on January/February 2017. Find more […]

How to edit metadata via the command line with ExifTool

In a previous post, I tried to find a metadata editor with a graphical user interface on Linux. The best solution, DigiKam, is designed for KDE. The second best option, XnView, is perfectible and not free software. As a Linux Mint (Cinnamon) user, I ended up thinking that it would be better to use a […]

How to edit image metadata on Linux

Image metadata is a complex field with multiple standards, the most important among them being Exif, IPTC-IIM and XMP. In this guide I try to find a solution to edit (read, modify, remove) image metadata (jpg, png, …) on Linux, if possible with a graphical user interface (GUI). Many photo editors and image manipulation programs […]

The Fairphone 2, Free Software and alternative operating systems

The Fairphone 2 is made by a certified B-Corporation based in Amsterdam, The Netherlands.  The Fairphone 2 is probably the world’s fairest and greenest piece of advanced consumer electronics. Here is why the Fairphone should matter to anyone interested in Free Software. Table of Content: Is the Fairphone 2 the freest phone available? The Sailfish […]

Free backup plugins for WordPress Multisite

This post is about free backup plugins for Wordpress Multisite installations. The web is full of really useless “greatest backup plugins” and “best WordPress backup” lists, as these ignominiously mix up paid and free plugins. Moreover, they hardly write a word about Multisite (also called WordPress MU for MultiUser or site network). I really had a […]

Multimedia, codecs, MP3 & DVD support on CentOS, Scientific Linux or RHEL

This tutorial details how to install full multimedia support, media codecs, MP3 & DVD support on Red Hat Enterprise Linux (RHEL) and its derivatives CentOS, Scientific Linux, Oracle Linux, ClearOS, … This howto assumes that you already installed RPMforge. To prevent conflicts and keep it simple, RPMforge is the only extra repostory we will use. […]

How to change the default application for a type of file on Linux

This howto explains how to change the default program to open all files with a given extension on Linux Mint, Ubuntu, Debian, and most Linux distributions. It also details how to change the default application for a batch of filetypes, for example all audio files or all video files. Set the default program for a […]

Sudo on CenOS, Red Hat Enterprise Linux and Scientific Linux

Sudo on CentOS / Scientific Linux / RHEL

This short howto is about setting up sudo on Red Hat Entreprise Linux and its derivates CentOS and Scientific Linux. It also gives a quick introduction on using the vi text editor through visudo. Becoming root: su & sudo CentOS, Scientific Linux and RHEL do not use sudo as Ubuntu does. Instead, you are supposed […]

10 reasons not to use Hotmail

Did you ever try to explain to a friend why he or she shouldn’t use Hotmail? There are many good reasons to avoid Microsoft’s services, but these reasons are not so easy to explain in a clear and unambiguous way. This article details 10 technical and ethical reasons about why Hotmail is not a good […]

Install DVD support (libdvdcss) on Debian or Ubuntu

On Linux, DVD support is provided through the libdvdcss or libdvdcss2 packages. Some distributions already include these packages (Linux Mint, Kodi/XBMC), but most don’t. Distributions without pre-installed DVD playing capabilities are Debian, Ubuntu, SUSE Linux, Fedora, … In earlier Ubuntu releases, DVD support as well as many other media codecs were available through the Medibuntu […]

Screenshot featuring a chameleon installing Virtual Box on a CentOS computer

Install VirtualBox on CentOS / RHEL / Scientific Linux

This how-to is about installing VirtualBox on CentOS. Provided instructions should also work on Scientific Linux and Red Hat Enterprise Linux (RHEL). It is possible to install VirtualBox from rpm packages, which can be downloaded on the VirtualBox Linux downloads page. However, a yum-style repository is also provided – we’ll use the latter. DKMS, RPMForge, […]

Install Flash Player directly from Adobe on Linux Mint, Ubuntu, …

Adobe Flash Player freezes constantly on my Ubuntu installation, sometimes crashing Firefox. Most of the time though, Firefox freezes for about a minute (the window gets darker) and “recovers”, but is still not playing Flash content or Youtube videos. Flash installation through Ubuntu Software Center fails Installing and uninstalling flashplugin-installer from the Software Centre didn’t […]

Older archived articles

Ubuntu & NVIDIA: external monitor, rotation, … (.pdf) January 2011: This how-to describes how to configure external monitors with the “NVIDIA X Server Settings” utility and enable rotation with RandRRotation. A new application background in OpenOffice Writer (.pdf) July 2009: playing with the application background in OpenOffice, including mockups of Writer with a picture or […]

How to install LibreOffice 3.3 on Ubuntu Linux

This article describes how to install LibreOffice on Linux. The installation may be based on the official .deb packages (installs without replacing or based on the LibreOffice ppa (replaces OOo). This how-to is for debian based Linux distributions, such as Ubuntu (and variations) and Linux Mint. July 2011: Update available here. (LibreOffice 5.1 or […]

Cheat-sheet: creating a new WordPress site

On this post I’ll share my experience on building up WordPress sites. I’m not a WordPress Guru, but after having spent many years with Joomla and Drupal, I really feel that WordPress is the best solutions for my needs: creating relatively small websites and maintaining them effectively. Everything feels so good with WordPress that I […]