How to install Firefox 61 on Linux Mint, Ubuntu, Debian, CentOS, Fedora…

… or any other Linux distribution. This how-to explains how to install Firefox 61 on Linux, with or without replacing an existing Firefox installation. Firefox 61 was released on June 26, 2018. Firefox 62 will be released on September 5, 2018. More information on Firefox release dates (including beta, nightly and ESR versions) can be […]

LibreOffice install - Logo with Libreoffice official Font and Document Foundation caption

How to install LibreOffice 6.0 on Linux Mint, Ubuntu, Xubuntu, Debian…

This article describes how to install LibreOffice 6.0 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 6.0 was released on January 31, 2018 LibreOffice 6.1 (which may be numbered 7.0) is scheduled to be released in August […]

How to set up automatic updates on Ubuntu Server 18.04

This guide explains how to configure automatic updates in Ubuntu Server 18.04 “Bionic Beaver”. This tutorial is based on the following official Ubuntu Documentation article: Ubuntu Server Guide » Package Management » Automatic Updates Step 1: package installation Install the unattended-upgrades package: sudo apt install unattended-upgrades This package may already be installed on your server. Step […]

How to install a LEMP stack on Ubuntu 18.04

Introduction This guide shows how to get a full LEMP software stack installed on Ubuntu 18.04. The LEMP stack can later be used to set up a CMS like WordPress, Joomla or Drupal. There are tons of tutorials on this subject. The goal of this particular one is to be the most comprehensive and best […]

Ubuntu: resolve the “perl: warning: Setting locale failed” problem

Are you running Ubuntu 14.04 or 16.04 desktop or server edition, and getting warning or errors when installing software via apt-get or aptitiude? Here is a typical error message: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_TIME = “es_ES.UTF-8”, LC_MONETARY = “de_DE.UTF-8”, LC_ADDRESS […]

XMind doesn’t start on Linux (Eclipse Error)

Problem: After a crash on Linux Mint, the mind mapping program XMind would not start. When executing XMind, the program displays a dialog with the following error message: An error has occurred. See the log file ~/Desktop/configuration/[numbers].log The .log file is as follows: !SESSION 2016-12-13 09:35:51.394 ———————————————– eclipse.buildId=R3.7.0.201611010032 java.version=1.8.0_111 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, […]

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, […]