Ubuntu's default APT repository ships an outdated Node.js build that is not suitable for modern JavaScript development. This guide installs Node.js 24.x from the NodeSource repository and covers NVM as an alternative for managing multiple versions side by side, verified with a running Express application confirming the setup. Install Node.js via NodeSource NodeSource maintains a Debian/Ubuntu repository that tracks current Node.js major releases, providing a single pinned version installed system-wide. 1. Update the APT package index: $ sudo apt update Enter fullscreen mode Exit fullscreen mode 2. Download the NodeSource setup script: $ curl -fsSL https://deb.nodesource.com/setup_24.x -o nodesource_setup.sh Enter fullscreen mode Exit fullscreen mode 3. Run the setup script: $ sudo bash nodesource_setup.sh Enter fullscreen mode Exit fullscreen mode 4. Install Node.js: $ sudo apt install nodejs -y Enter fullscreen mode Exit fullscreen mode 5.…