nginx:restart

The command systemctl restart nginx is used to restart the Nginx web server on a Linux system. Here is a breakdown of the command:

• systemctl is a command-line tool used to manage systemd units, which are daemons or services in Linux.
• restart is the action being performed on the Nginx service. In this case, it is restarting the service, which stops and then starts it again.
• nginx is the name of the service being restarted. Nginx is a popular web server and reverse proxy server software.

So, when you execute systemctl restart nginx, it will stop the Nginx service if it is running, and then start it again, effectively restarting the web server. This command is typically used after making changes to Nginx configuration files, as it allows the new changes to take effect without needing to stop and start the web server manually.