The output will look something like below: To check the status of the Apache service, use the following command: sudo systemctl status apache2 The Linux Command Line Series: An Introduction To Linux Commands View Apache Status # If there are any errors, the command prints a detailed message. The output will look like this: Syntax OK Use the following command to test the Apache configuration for any syntax or system errors: sudo apachectl -t Whenever you make changes to the Apache server’s configuration file it is a good idea to test the configuration before restarting or reloading the service. To reload Apache, use one of the following commands: sudo systemctl reload apache2 sudo service apache2 reload Test Apache Configuration # On reload, the main apache process shuts down the child processes, loads the new configuration, and starts new child processes. You need to reload or restart Apache whenever you make changes to its configuration. This is the command that you will probably use the most frequently. Use one of the following commands to perform a restart: sudo systemctl restart apache2 sudo service apache2 restart The restart option is a quick way of stopping and then starting the Apache server. To stop Apache, run one of the following commands: sudo systemctl stop apache2 sudo service apache2 stop Restart Apache # Stopping Apache quickly shut down the main Apache process and all child processes even if there are open connections. Instead of manually starting the Apache service it is a good idea to set it to start on system boot: sudo systemctl enable apache2 Stop Apache # If you are running an older Linux distribution without systemd to start Apache type: sudo service apache2 start On success, the command doesn’t produce any output. If you are running CentOS, just replace apache2 with httpd in the commands below. In Ubuntu and Debian, the Apache service is named apache2, while in Red Hat based system such as CentOS, the name of the Apache service is httpd.

The commands in this guide should work on any modern Linux distribution like Ubuntu 18.04 We’re assuming that you are logged in as root or user with sudo privileges. In this guide, we will go over the most important and frequently used Apache commands, including starting, stopping, and restarting Apache. If you are a developer or system administrator, chances are that you’re dealing with Apache regularly. It is a free, open-source, and cross-platform HTTP server providing powerful features that can be extended by a wide variety of modules.

Apache HTTP server is the most popular web server in the world.

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