Category Archives: Tips and Tricks

Ubuntu, Oh My Zsh, Powerlevel10k and Meslo fonts

I haven’t been using Ubuntu for a while, but I wanted to give it another try. I’m using my Ansible playbook for installing ZSH, Oh My Zsh, and p10k (Powerlevel10k), so I thought everything would work like a charm. However, after running the playbook and restarting, the terminal did not look quite right: You see […]

Maven, parents, aggregators and version update

In this blog post, I will describe a few scenarios where you want to update versions in a multi-module Maven project consistently. In these examples, you have both a parent POM, which is meant to contain common properties and configurations to be inherited throughout the other projects, and aggregator POMs, which are meant to be […]

TLP: Limiting Battery Charge on LG Gram in Linux

I had already blogged on how to limit battery charge on LG Gram in Linux. In that post, you had to manually set the threshold “80” in the file “/sys/devices/platform/lg-laptop/battery_care_limit”. With TLP, the procedure is easier and more automatic. First, you must install tlp (remember that tlp conflicts with power-profiles-daemon, so you have to disable […]

Hyprland and the Variety wallpaper manager

I’ve just started experimenting with the Wayland compositor Hyprland and wanted to use my favorite wallpaper manager, Variety. Unfortunately, Variety does not support Hyprland out of the box. However, it’s easy to make it work also on Wayland. I’m going to use Arch Linux in this blog post. First of all, you must install “swaybg”, […]

Maven profiles that are really active by default

While working on my TDD book, I played with Maven profiles to write the chapter. If you use Maven profiles, you might want to use an activation strategy to enable the profile under certain circumstances automatically. There’s also a particular option, “<activeByDefault>”, which seems self-explanatory. This must mean that that profile will be constantly active […]

Taming KDE baloo

Quoting from https://community.kde.org/Baloo, Baloo is the file indexing and file search framework for KDE Plasma, with a focus on providing a very small memory footprint along with extremely fast searching. Unfortunately, it has a bad reputation for being a resource hog. However, it all boils down to configuring it appropriately (of course, according to your […]

Fixing Docker problems in Fedora

In this post, I’ll describe a few problems with Docker in Fedora and how to fix them. In particular, I’ll try to provide an analysis of the problems and the sources of the solutions. I’ve experienced a few problems with Docker in Fedora (35 and 36). I first installed docker-ce by following the official documentation: […]

VirtualBox in Fedora Linux

I have no problem installing VirtualBox and the related tools and extensions in Ubuntu and Arch. In Fedora, things are a little bit harder. First, I think it’s better NOT to download binaries distributed by VirtualBox: I’m using Fedora packages that are available from RPM Fusion Free. Thus, first of all, you have to enable […]

Again woes for KDE and Google Accounts

TL;DR If you want to access your Google Calendars from Korganizer or Kalendar, remember to enable “Enable the KDE wallet subsystem”. I had already written about the cumbersome procedure to access Google accounts in KDE, and I thought I had learned enough to “easily” set my Google calendars in KDE. I was wrong. Today I […]

SSH into a VirtualBox machine

I use VirtualBox a lot for testing purposes, mainly to experiment with a Linux distribution (to see whether it’s worthwhile to install it on bare metal) and to test procedures that might involve some complex (and maybe “dangerous”) operations. After you install VirtualBox Guest Additions, things like bidirectional copy-and-paste will work. Some distributions seem to […]

Finding a type in the classpath of an Eclipse Java project

Recently, I started to contribute and maintain Pitclipse, an Eclipse plugin for running mutation testing with PIT. We needed a mechanism to detect whether JUnit 5 is in the classpath of a Java project (so that we could run PIT with its JUnit 5 plugin). The first implementation of such a mechanism was rather cumbersome […]

Locate and BTRFS

I’ve always been using the locate command (provided by the mlocate package or by the new plocate package), which quickly searches for files and directories by their names. The command relies on the database built by the command updatedb (which should be run periodically, e.g., by enabling the plocate-updatedb.timer service for plocate). Unfortunately, by default, […]

Configure Arch Pacman

Pacman is the package manager in Linux Arch and Linux Arch-based distributions. I’ve been using EndeavourOS for some time, and I enjoy it. EndeavourOS is pretty close to vanilla Arch. I also experimented with pure Arch (more on that in future blog posts). However, the output of pacman in EndeavourOS is much more excellent and […]

Dropbox and Gnome 42

Now that Gnome 42 has been released and available in most Linux distributions, I started experiencing problems with the Dropbox icon in the system tray. First of all, I have no problem with Ubuntu 22.04, which comes with the extension “AppIndicator and KStatusNotifierItem Support” https://extensions.gnome.org/extension/615/appindicator-support/. Moreover, I think the problem is not there because, while […]