The server needs to install nodejs

Nowadays, with the continuous development of Internet and mobile Internet applications, servers have become one of the infrastructures for various applications. For Web applications, the choice and configuration of the server directly affects the performance and stability of the Web application. Among these servers, Node.js is gradually becoming the mainstream choice for web application deployment. This article will introduce the relevant knowledge of Node.js from the aspects of what is Node.js, why to choose Node.js, how to install Node.js and some practical application scenarios of Node.js.

1. What is Node.js

Node.js is a JavaScript running environment based on the Chrome V8 engine, which enables JavaScript to run on the server side. Since JavaScript is a lightweight scripting language, it was originally only used for Web front-end development. But with the emergence of Node.js, JavaScript can also run on the server side, bringing new ideas and methods to server-side development. The characteristics of Node.js include:

1. Event-driven: Node.js uses an event-driven approach instead of a thread pool or process pool to handle requests. Therefore, it can handle a large number of concurrent requests. has good performance.

2. Non-blocking I/O: Node.js adopts a non-blocking method when performing I/O operations, so it can better utilize system resources.

3. Lightweight and efficient: The core feature of Node.js is that it is lightweight and efficient, with almost no heavy functions and APIs associated with browsers.

4. Cross-platform: Node.js supports running on Windows, Linux, Mac OS X and other operating systems, greatly increasing the portability of its applications.

5. Open source: Node.js is open source and highly scalable and customizable.

2. Why choose Node.js

As a JavaScript running environment, Node.js brings huge advantages to server-side development. Here are some reasons to choose Node.js:

1. Efficiency: Node.js’s event-driven and non-blocking I/O methods can minimize CPU and memory consumption when processing a large number of concurrent requests. to increase application performance.

2. Development efficiency: The source code and ecological environment of Node.js are very rich, which can meet developers' needs for server-side functions. At the same time, its cross-platform nature can further improve development efficiency.

3. High scalability: The open source code of Node.js greatly increases its scalability, and there are also a large number of third-party modules that allow developers to easily implement highly scalable applications. program.

4. Simple maintenance: Node.js’s open source code and standards-based API make it easy to maintain and develop, and it also makes it easy for developers to generate appropriate code and files when using Node.js. structure.

5. Community support: Node.js has a huge development community, and a large number of open source software are released every day, providing important support to developers.

3. How to install Node.js

The following are the steps to install Node.js on the Ubuntu 18.04 operating system:

1. Update the local package index:

sudo apt update

2. Install Node.js through third-party PPA

sudo apt install curl
curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
sudo apt install nodejs

3. Check whether Node.js is successfully installed:

node -v

4. Practical application scenarios of Node.js

Node.js is widely used in real-time applications, such as online games, real-time chat, method location tracking, sensor data, collaboration tools, collaborative documents, etc. In addition, Node.js can also be used in web applications, back-end services, RESTful API and other fields, and can also be well integrated with various databases, such as MySQL, MongoDB, PostgreSQL, etc.

Summary: Node.js is a lightweight, efficient, cross-platform, open source JavaScript running environment that can provide efficient performance in a non-blocking I/O and event-driven manner. Node.js is widely used in web applications, back-end services, RESTful API and other fields. It is favored by the open source community and enterprise users because of its simplicity, easy maintenance and high scalability. This article introduces the knowledge, usage advantages and installation steps of Node.js, hoping to give readers a deeper understanding of Node.js.

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