The command "sudo apache2ctl -M" is used to display a list of all the loaded modules in the Apache web server. Here is a breakdown of the command:
"sudo" is a command used in Unix-like operating systems to run a command with elevated privileges. It stands for "Super User Do" and allows the user to execute a command as the root user or any other privileged user specified.
"apache2ctl" is a command-line utility for managing the Apache HTTP server. It provides various functions to control and configure the server.
"-M" is an argument or option used with the "apache2ctl" command. In this case, it instructs the command to display a list of loaded Apache modules.
Using the "sudo" command ensures that the "apache2ctl" command is executed with the necessary root privileges required to access the Apache server configuration and module information.
Overall, the command "sudo apache2ctl -M" is used to list all the currently loaded modules in the Apache web server, which can be useful for troubleshooting or verifying module installations.