Javiercachon.com
The website of a computer science student.
The online academy of free and free content creation to democratize education and that bets strongly with the philosophy of open source, free software and GNU/Linux operating systems.
What is this website?
JavierCachon.com It is an innovative educational platform that seeks to democratize access to knowledge in computer science, telecommunications, and technology. With a bilingual approach (Spanish and English), we offer high-quality, free, and accessible technical training, without economic or geographical barriers, from the Community of Madrid in the beautiful town of Cercedilla, located in the Sierra de Guadarrama mountains.
What do we offer?
We specialize in GNU/Linux, open source and free software, offering structured courses, specialized articles and interactive resources so that anyone, regardless of their level of experience, can learn, collaborate and grow professionally. If you're looking for free training, up-to-date tools and a collaborative environment to enhance your IT skills, you've come to the right place. GNU/Linux, free and open source software, providing structured courses, e-books and PDFs, expert articles and interactive resources so that anyone, regardless of their level, can learn and develop professionally.
Our philosophy?
Our philosophy centers on the open knowledge, with content under licenses Creative Commons BY and GPL, fostering collective learning, collaboration, and technological innovation. The active community of JavierCachon.com allows professionals and enthusiasts to solve problems, share knowledge, and participate in free software projects.
Our mission?
We support the digital freedom, transparency and technological independence, promoting free tools and innovative solutions. This project seeks to establish itself as a tech startup that optimizes and continuously expands training and available resources.
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Javier Cachón Garrido
Installing Snap on Debian 13 and fixing the issue where the app doesn't appear in the XFCE app menu
Debian 13 (Trixie) remains true to its classic philosophy: stability, administrative control, and a clean ecosystem based on .deb packages. However, in professional environments and also on teaching workstations, it is increasingly common to combine the traditional apt package manager with universal formats like Snap, which allow quick access to modern, up-to-date applications isolated from the base system.
Install LibreOffice from repositories on Debian 13 in Spanish, dictionaries and help
LibreOffice is a free and cross-platform office suite developed by the international community and aimed at replacing traditional proprietary solutions such as Microsoft Office.
Installation and configuration of KVM with a graphical environment on Debian 13 (Trixie)
KVM (Kernel-based Virtual Machine) is the virtualization technology integrated directly into the Linux kernel. It acts as a Type 1 (bare-metal) hypervisor: virtualization runs at the lowest level of the host operating system, leveraging hardware extensions of the CPU (Intel VT-x or AMD-V) and providing near-native performance.
VirtualBox error on Debian 13: AMD-V is being used by another hypervisor (VERR_SVM_IN_USE)NS_ERROR_FAILURE (0x80004005)
The error means that hardware virtualization (AMD-V / SVM) is being used by another hypervisor on your Linux host system.
VirtualBox tries to use it… but something has already “hijacked” it.