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.
Overview
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
Options
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
Notes
- The
bmodinfocommand is only available on systems that use thekmodpackage, such as Red Hat Enterprise Linux and CentOS. - The output of the
bmodinfocommand can be quite verbose, so it may be helpful to pipe the output through a pager such aslessfor easier viewing.