To upgrade Node.js on Linux using NVM, follow these steps:1. Install NVM: Use the package manager to update and then install NVM.2. List available Node.js versions: Check the available Node.js versions for installation.3. Upgrade Node.js: Install the desired Node.js version and set it as the default.4. Troubleshooting common issues: Address problems like 'nvm command not found' or version rollback.