How to use the command a2dissite (with examples)

The a2dissite command is used to disable an Apache virtual host on Debian-based operating systems. It allows users to deactivate a virtual host configuration, preventing it from being served by Apache.

Use case 1: Disable a virtual host

Code:

sudo a2dissite virtual_host

Motivation: The a2dissite command is especially useful when managing multiple virtual hosts on an Apache server. By disabling a virtual host, you can ensure that the website or application associated with it is temporarily taken offline or no longer accessible to the public.

Explanation:

• sudo: This command is used to run the a2dissite command with administrator privileges.
• a2dissite: This is the actual command followed by the virtual host name, virtual_host, that should be disabled.

Example output:

Site virtual_host disabled.
To activate the new configuration, you need to run:
  systemctl reload apache2

Use case 2: Don’t show informative messages

Code:

sudo a2dissite --quiet virtual_host

Motivation: When automating server management tasks, it is often desirable to suppress any unnecessary output or informative messages. Using the --quiet option with the a2dissite command allows you to do just that.

Explanation:

• sudo: This command is used to run the a2dissite command with administrator privileges.
• a2dissite: This is the actual command followed by the --quiet option to suppress informative messages, and the virtual host name, virtual_host, that should be disabled.

Example output: (with no informative messages displayed)

Conclusion: The a2dissite command is a valuable tool when it comes to managing Apache virtual hosts on Debian-based operating systems. Whether you need to temporarily take a website offline or automate server management tasks, this command provides a simple and efficient way to disable virtual hosts.