nginx:config:test

The command "nginx -t" is used to test the configuration file of the Nginx web server.

When you run this command, it checks the syntax and validates the configuration file without actually starting the server. The "-t" option is used to specify that you want to test the configuration.

If there are any syntax errors or issues with the configuration file, Nginx will display error messages indicating the exact location and nature of the problem. If the configuration file is correct and error-free, it will display a message confirming that the configuration is valid.

This command is useful during the initial setup or when making changes to the Nginx configuration. It helps to catch any mistakes or misconfigurations before applying the changes and potentially causing issues with the server.