bmodinfo – Display detailed information about a given module

The bmodinfo command is used to display detailed information about a kernel module. It is a useful tool for administrators who need to troubleshoot issues with kernel modules or need to verify the version and authorship of a particular module.


The syntax for using the bmodinfo command is as follows:

bmodinfo MODULE

Where MODULE is the name of the kernel module that you want to display information about.

For example, to display information about the ext4 module, you would run the following command:

bmodinfo ext4

This will display detailed information about the ext4 module, including the version, author, and a description of the module.

Use cases

The bmodinfo command can be useful in a variety of situations, including:

  • Troubleshooting issues with kernel modules
  • Verifying the version and authorship of a particular module
  • Checking the dependencies of a module
  • Understanding the purpose and functionality of a module


The bmodinfo command has the following options:

Option Description
-h Display help message and exit
-d Show dependencies of the module
-F Display the value of a specific field (e.g. -F author)
-k Specify the kernel version to use (e.g. -k /boot/vmlinuz-5.4.0-42-generic)
-p Show the path to the module file
-v Display verbose output

Troubleshooting tips

If you encounter issues with the bmodinfo command, here are some troubleshooting tips:

  • Ensure that you are running the command as root or with sudo privileges
  • Double-check the spelling of the module name
  • Verify that the module is loaded in the kernel before running the command


  • The bmodinfo command is only available on systems that use the kmod package, such as Red Hat Enterprise Linux and CentOS.
  • The output of the bmodinfo command can be quite verbose, so it may be helpful to pipe the output through a pager such as less for easier viewing.