Ubuntu Node.js如何使用NPM包管理器_运维文库_资讯中心

发布时间:2026-04-26 23:39:27

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Installing Node.js and NPM on Ubuntu
To use NPM, you first need to install Node.js (which includes NPM by default). There are two common methods: using Ubuntu’s official repositories or the NodeSource repository (recommended for the latest stable version).

Method 1: Install from Ubuntu’s Official Repositories
Run the following commands to update your package list and install Node.js with NPM:
```
sudo apt update
sudo apt install nodejs npm
```

Method 2: Install from NodeSource Repository (Recommended)
For the latest stable version of Node.js, add the NodeSource repository and install:

curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -  # Replace "16.x" with your desired version (e.g., 18.x)
sudo apt install -y nodejs

After installation, verify success by checking the versions:

node -v  # Displays Node.js version (e.g., v16.14.0)
npm -v   # Displays NPM version (e.g., 8.5.0)

Basic NPM Commands for Package Management
NPM allows you to install, update, and manage dependencies for your Node.js projects. Below are essential commands:

Initialize a New Project
Create a package.json file (the manifest for your project) in your project directory:
```
npm init -y  # Uses default values; omit "-y" to customize interactively
```
Install Local Packages
Install a package (e.g., express) into your project’s node_modules folder and add it to package.json as a dependency:
```
npm install express          # Installs the latest version
npm install express@4.18.2   # Installs a specific version
```
Use --save-dev to add the package as a development dependency (e.g., testing tools like jest):
```
npm install jest --save-dev
```
Install Global Packages
Install packages globally (accessible from any directory) for command-line tools (e.g., nodemon):
```
sudo npm install -g nodemon  # Requires sudo for global installations
```
Update Packages
Update all installed packages to their latest versions:
```
npm update
```
Update a specific package (e.g., express):
```
npm update express
```
Uninstall Packages
Remove a local package from your project and package.json:
```
npm uninstall express
```
Remove a global package:
```
sudo npm uninstall -g nodemon
```
Run Scripts
Execute scripts defined in your package.json (e.g., a start script to launch your app):
```
npm run start
```

Configuring NPM for Better Workflow
Customize NPM’s behavior to suit your needs:

Set a Mirror Registry (Accelerate Downloads)
Switch to a faster mirror (e.g., Taobao) to avoid slow downloads from the official registry:
```
npm config set registry https://registry.npmmirror.com
```
Verify the change:
```
npm config get registry
```
Upgrade NPM to the Latest Version
Keep NPM up-to-date to access new features and security patches:
```
npm install -g npm@latest
```
Fix Global Installation Permissions (Avoid sudo)
By default, global installations require sudo, which can cause permission issues. To fix this, change the ownership of the global node_modules folder:
```
sudo chown -R $USER /usr/local/lib/node_modules
```
After running this command, you can install global packages without sudo.

Optional: Use nvm to Manage Multiple Node.js Versions
If you need to switch between different Node.js versions (e.g., for testing compatibility), use nvm (Node Version Manager):

Install nvm
Run the following command to install the latest version of nvm:

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash
source ~/.bashrc  # Load nvm into your current shell session

Install and Switch Node.js Versions
Install a specific version of Node.js (e.g., 14.17.0):
```
nvm install 14.17.0
```
Switch to the installed version:
```
nvm use 14.17.0
```
Set a default version (used when opening new terminals):
```
nvm alias default 14.17.0
```

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