Linux widely uses operating system in the server side and client side. Linux operating system provides flexible options to install our custom packages and extensions based on our project requirement. Apache is developed and maintained by an Open community of Apache Software Foundation. Apache is free and open source software and it is available for a wide variety of operating systems, including Unix, Linux, Microsoft windows, OS X, OS/2, Solaris, TPF, OpenVMS, NetWare, FreeBSD and eComStation.
To list out all installed or activated apache modules from your server, use the following command.
Note: These commands only accessible for sudo privilege users
sudo apache2ctl -M
apache2ctl is Apache HTTP server control interface (ctl stands for control) helps control the Apache HTTPS daemon.

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