Creating a Linux daemon with Node.js involves designing a Node.js app that can run as a background service even after the terminal is closed. A common way to do this is to use the “forever” module from npm (Node.js package manager). Here are the steps:
1. Install Node.js and npm: If you haven’t installed Node.js and npm, you can install it using the following on a Debian-based system, say Ubuntu: \`\`\`bash sudo apt-get install curl curl -sL https://deb.nodesource.com/setup\_14.x | sudo -E bash - sudo apt-get install -y nodejs \`\`\`
1. Create your Node.js application: Create a simple “Hello, World” app. \`\`\`bash echo ‘console.log(“Hello, World!”);’ > app.js \`\`\`
1. Install `forever` Module: Install the `forever` module globally so you can use it in your projects. \`\`\`bash sudo npm install forever -g \`\`\`
1. Start the App with `forever`: Now, you can start your app as a daemon using `forever`. \`\`\`bash forever start app.js \`\`\`
Your app is now running as a daemon and will continue to do so until stopped.
Note:
1. Keep in mind that these are pretty basic steps and in real projects, you would care more about error handling, logging, starting the app on system reboot, and many more.
2. Tools like PM2, systemd, docker work very well for running Node.js applications as daemons.
3. Using forever and tools like PM2, you can manage your application, like restarting it when it crashes, cluster mode to scale your application, watch changes in the file system, and much more. Consider exploring them according to your requirement.
