Click the link to jump to the official installation instructions of nodered

https://nodered.org/docs/getting-started/

Install according to your operating system

The following is a local linux (CentOS) operating system installation as an example

Paste into the command line interface and run，

Wait for the installation to complete

Verify that the installation was successful

Type in the command line interface  node-red   

The following information appears to prove that the installation has been successful

Login to nodered interface

Enter your public IP address followed by the port number 1880

example：http://xxx.xx.xx.xx:1880/

If you want to start nodered as a background process

Type in the command line interface   nohup node-red &

It will prompt after startup

After seeing the above information, press enter

Type in the command line   exit

The above is the installation and startup process of nodered. If you don't understand anything, you can go to the nodered official website. There are installation instructions for various systems. The address has a link at the top