a2query is a command-line tool that is used to manage the Apache HTTP Server on Ubuntu and other Linux-based systems. It allows you to view, modify, and configure various aspects of the Apache web server, such as virtual hosts, modules, and directories.
To use A2query, you need to have the Apache HTTP Server installed on your system and be logged in as a user with sufficient privileges to modify Apache configuration.
If you encounter the below error while running the a2query command:
a2query: command not found
you may try installing the below package as per your choice of distribution:
| OS Distribution | Command |
|---|---|
| Debian | apt-get install apache2 |
| Ubuntu | apt-get install apache2 |
| Alpine | apk add apache2 |
| Kali Linux | apt-get install apache2 |
| Raspbian | apt-get install apache2 |
a2query Command Examples
1. List enabled Apache modules:
# a2query -m
2. Check if a specific module is installed:
# a2query -m module_name
3. List enabled virtual hosts:
# a2query -s
4. Display the currently enabled Multi Processing Module:
# a2query -M
5. Display the Apache version:
# a2query -v
For more information about A2query and its usage, you can consult the Apache HTTP Server documentation or run the command man a2query to view the A2query manual page.