nodejs installation and global configuration

Node.js is a very popular JavaScript runtime environment used by many people to build server-side applications. Node.js installation and global configuration are the basis of Node.js development. This article will introduce how to install Node.js and configure it globally.

Part One: Node.js Installation

Step 1: Download Node.js

Before installing Node.js, you need to download the Node.js installation package first . Because Node.js is cross-platform, you need to choose the version that corresponds to your system. On the official website, four different installation packages are provided, namely Windows, Mac OS X, Linux and source code. Choose the version that suits your own operating system and start the download.

Step 2: Install Node.js

After downloading the installation package, double-click to execute the installation program and follow the prompts to install. Just install according to the default options, no other configuration changes are required. When the installer has finished running, you will see a prompt telling you that Node.js has been successfully installed.

Step 3: Test whether Node.js is installed correctly

After installing Node.js, you need to test whether the installation is successful. This can be achieved by executing the following command:

$ node -v

If you can see the version number of Node.js on the command line, then congratulations, Node.js has been successfully installed. and configured.

Part 2: Global configuration of Node.js

After you successfully installed Node.js, the next step is global configuration. The following are some common questions about configuration:

1. How to set the installation path of Node.js?

By default, Node.js will be installed to the system's program folder. However, sometimes you may need to install it to another directory. To do this, you just need to select a custom installation path when executing the installer.

2. How to check where the module file of Node.js is?

When you execute the npm-install command, Node.js will save the downloaded module file package in a local folder. This folder is located in your home directory. You can find it by executing the following command:

$ npm config get prefix

After executing this command, you will get the root directory path of Node.js. Under this path, there is a folder named node_modules, which stores all downloaded modules.

3. How to change the default module search path of Node.js?

By default, Node.js will look for module files in the current directory. If you want to change its default path, you can create a file named node.sh in its bin directory and define a NODE_PATH variable to tell the location of the Node.js module file, for example:

export NODE_PATH=/usr/local/lib/node_modules

After adding this line, you can use this global variable to locate your module.

Summary:

The installation and global configuration of Node.js are the basis for Node.js development. This article briefly explains how to download and install Node.js, and provides some FAQs for global configuration. By following these guidelines, you can easily install and configure Node.js and use it in your development work.

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