How to restart Node.js

Node.js is a popular JavaScript runtime environment that is widely used in development. However, sometimes during development, we may encounter some issues that may cause Node.js to crash or stop functioning. At this time we need to restart Node.js to resume normal operation. This article will explain how to restart Node.js.

1. Restart in the console

In the console, we can use the following command to restart Node.js:

Ctrl + C

This command can stop the running Node.js process, but the Node.js process needs to be re-run. The Node.js process can be restarted using the following command

node app.js

This command ensures that our application is running again.

2. Using nodemon

Next, we will introduce a more convenient restart method, which can use the third-party package Nodemon. It is a utility tool that automatically restarts Node.js applications. Its advantage is that it can automatically detect file changes.

Install Nodemon:

$ npm install -g nodemon

Use Nodemon to run our Node.js application:

$ nodemon app.js

When we modify code or other files, Nodemon will automatically detect the file changes and restart the application. This process can improve the efficiency of web development.

3. Using pm2

In addition to Nodemon, we can also use another popular process manager pm2 to restart Node.js applications. It not only supports restarting, but also Help us achieve process monitoring and load balancing.

Install pm2:

$ npm install pm2 -g

Run our Node.js application using pm2:

$ pm2 start app.js

Use the following command to view the running status:

$ pm2 list

Now if To restart the application, you can use the following command:

$ pm2 restart app

pm2 There are many other useful commands, for example, you can use pm2 stop to stop the application, use pm2 logs to view the logs, etc.

Summary

During the Node.js development process, various problems may arise, one of which is that the application crashes or stops running. In this case, we need to restart Node.js to get it back up and running. This article introduces three methods: restarting in the console, automatically restarting Nodemon, and using the pm2 process manager. Depending on different needs and usage scenarios, different restart methods can be selected.

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