rmmod

The command line tool "rmmod" is used in Linux systems to remove kernel modules. A module is a small piece of code that can be loaded or unloaded dynamically into the kernel without requiring a reboot.

The "rmmod" command is typically used with the name of the module as an argument to unload it. When executed successfully, the command removes the module from the kernel, freeing system resources and disabling any functionalities provided by it.

The "rmmod" command cannot be used to remove modules that are required by the system or being used by any other processes. It requires root privileges to execute, ensuring that only authorized users can remove kernel modules.

Before removing a module, it is recommended to verify its name with the "lsmod" command to ensure accurate identification. Additionally, some modules might have dependencies, and removing the primary module can lead to the automatic removal of its dependent modules.

In case the "rmmod" command fails to remove a module, it could be due to various reasons such as the module being in use or the absence of required permissions. It is advisable to troubleshoot the issue or consult documentation specific to the module before attempting to forcefully remove it.