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rmmod command in Linux with Examples

Last Updated : 10 Oct, 2024

The rmmod command in Linux is used to remove or unload a module from the kernel. Modules are pieces of code that can be dynamically loaded into the Linux kernel to extend its functionality, such as drivers for hardware devices. When a module is no longer needed, it can be removed using rmmod.

Although many users prefer to use the modprobe -r command for removing modules, rmmod directly unloads a module from the kernel.

rmmod [options] [modulename]

where,

• modulename: The name of the module to be removed.
• [options]: Various optional flags that modify how rmmod behaves.

rmmod bluetooth

It will print the general syntax of the rmmod along with the various options that can be used with the rmmod command as well as gives a brief description about each option.

Example:

This option prints messages about what the program is being doing. Usually rmmod only prints messages only if something went wrong.

Example:

rmmod -v bluetooth

This option can be extremely dangerous. It takes no effect unless CONFIG_MODULE_FORCE_UNLOAD is being set when the kernel was compiled. With this option, you can remove the specified modules which are being used, or which are not being designed to be removed or have been marked as not safe.

Example:

sudo rmmod -f bluetooth

By default, error messages are sent to standard error. The -s option redirects error messages to the system log (syslog) instead of displaying them on the terminal.

Example:

rmmod -s bluetooth

This option will going to show version of program and then exit.

rmmod -V

The rmmod command in Linux provides a direct way to unload kernel modules from the system. If you're performing system maintenance, managing drivers, or troubleshooting, understanding how to use rmmod is essential. While the command is powerful, it should be used carefully, especially when forcing the removal of modules. In many cases, using modprobe -r may be safer due to its dependency handling.

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