Fedora linux kernel headers

Fedora 31: «Please install the Linux kernel «header» files matching the current kernel for adding new hardware support to the system» in VirtualBox

I’m using Fedora 31 and installed VirtualBox using RPM from the website (VirtualBox-6.1-6.1.14_140239_fedora31-1.x86_64.rpm), which should be the most recent version. Starting it gives me the following error:

$ virtualbox WARNING: The vboxdrv kernel module is not loaded. Either there is no module available for the current kernel (5.8.11-100.fc31.x86_64) or it failed to load. Please recompile the kernel module and install it by sudo /sbin/vboxconfig You will not be able to start VMs until this problem is fixed. 

$ uname -a Linux localhost.localdomain 5.8.11-100.fc31.x86_64 #1 SMP Wed Sep 23 15:15:42 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux 

**Kernel driver not installed (rc=-1908)** The VirtualBox Linux kernel driver is either not loaded or not set up correctly. Please try setting it up again by executing '/sbin/vboxconfig' as root. If your system has EFI Secure Boot enabled you may also need to sign the kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load them. Please see your Linux system's documentation for more information. where: suplibOsInit what: 3 VERR_VM_DRIVER_NOT_INSTALLED (-1908) - The support driver is not installed. On linux, open returned ENOENT. 

$ sudo /sbin/vboxconfig vboxdrv.sh: Stopping VirtualBox services. vboxdrv.sh: Starting VirtualBox services. vboxdrv.sh: Building VirtualBox kernel modules. This system is currently not set up to build kernel modules. Please install the Linux kernel "header" files matching the current kernel for adding new hardware support to the system. This system is currently not set up to build kernel modules. Please install the Linux kernel "header" files matching the current kernel for adding new hardware support to the system. There were problems setting up VirtualBox. To re-start the set-up process, run /sbin/vboxconfig as root. If your system is using EFI Secure Boot you may need to sign the kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load them. Please see your Linux system's documentation for more information. 

Most pages refer to installing something like: sudo dnf install -y kernel-devel kernel-devel-$(uname -r) but this gives me an error as the package can’t be found. I checked on some VirtualBox-Forums, dealing with Fedora. They also recommend installing the headers, just with a slightly different command. Either it can’t be found or it’s installed already:

Das Paket kernel-headers-5.8.11-100.fc31.x86_64 ist bereits installiert. No match for argument: kernel-devel-5.8.11-100.fc31.x86_64 Fehler: Es konnte kein Treffer gefunden werden.: kernel-devel-5.8.11-100.fc31.x86_64 

In most Ubuntu Forums it seems the issue is somewhat quickly removed with the same command, just by apt-get. Sometimes it’s claimed the packages would be outdated, but as Fedora is updated more frequent than Ubuntu I wonder what’s the problem behind it.

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How to Install Linux Kernel Headers on Fedora 38/37/36 Linux

If you use a Fedora Linux system, you may need to install missing kernel headers to build and install specific software. This guide will show you how to install missing kernel headers on Fedora.

What are Linux Kernel Headers? Explained

Linux Kernel Headers are crucial for connecting the Linux Kernel with user-space programs. They consist of a collection of C header files that define all the interfaces and data structures used by the kernel. These headers enable direct communication between user-space programs and the kernel, allowing user-space software to access information about the kernel’s configuration, such as its version or build options. This makes it easier for users to build Linux-specific software on their machines. Understanding the importance of Linux Kernel Headers is essential for new users who want to delve deeper into their system’s configuration.

Step 1: Update Fedora

Before proceeding, ensure your system is up-to-date regarding the Linux Kernel. If any Linux Kernel packages are updated, ensure to restart your system.

Step 2: Check the Current Linux Kernel

First, to install the missing kernel headers, it’s essential to check the current kernel version. This step can be done by executing the following command in the terminal.

The command will show the version of the currently running kernel. Note this version as it will be needed in the next step.

Step 3: Install Linux Kernel Headers

After identifying the kernel version, the kernel headers package can be installed. On Fedora Linux, this can be done by executing the following command in the terminal.

sudo dnf install kernel-headers

Sometimes this may work but not correctly if you install Nvidia Drivers; you may need to use the following command instead.

sudo dnf install kernel-headers-$(uname -r) 

This command installs the kernel headers package corresponding to the currently running kernel version. Now, rebooting your Fedora system after installing any kernel packages is an optional step that you may choose to take.

Step 4: Verify Linux Kernel Headers Installation

After installing the headers package for your Linux Kernel, you can verify the successful installation by running the following command.

sudo dnf list installed | grep kernel-headers

This command will show a list of all the installed kernel-headers packages. The package you recently installed should be visible in the list.

kernel-headers.x86_64 6.1.5-200.fc37 @updates 

Conclusion:

In conclusion, installing Linux Kernel headers on Fedora is a straightforward process that involves checking the current kernel version, installing the matching headers package, and verifying the installation. These steps ensure the kernel headers are in place for building and installing specific software.

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How to install kernel headers on Linux

Question: I need to install kernel headers to install a device driver for my kernel. What is a proper way to install matching kernel headers on [insert your Linux distro]?

When you compile a device driver a custom kernel module, you need to have kernel header files installed on your Linux system. Kernel headers are needed also when you build a userspace application which links directly against the kernel. When you install kernel headers in such cases, you must make sure to kernel headers are exactly matched with the kernel version of your system (e.g., 3.13.0-24-generic).

If your kernel is the default version that comes with the distribution, or you upgraded it using the default package manager (e.g., apt-get , aptitude or yum ) from base repositories, you can install matching kernel headers using the package manager as well. On the other hand, if you downloaded the kernel source and compiled it manually, you can install matching kernel headers by using make command.

Here we assume that your kernel comes from base repositories of your Linux distribution, and see how we can install matching kernel headers.

Install Kernel Headers on Debian, Ubuntu or Linux Mint

Assuming that you did not manually compile the kernel, you can install matching kernel headers using apt-get command.

First, check if matching kernel headers are already available on your system using dpkg-query command.

$ dpkg-query -s linux-headers-$(uname -r)

dpkg-query: package 'linux-headers-3.11.0-26-generic' is not installed and no information is available

Go ahead and install matching kernel headers as follows.

$ sudo apt-get install linux-headers-$(uname -r)

Verify that matching kernel headers are successfully installed.

$ dpkg-query -s linux-headers-$(uname -r)

Package: linux-headers-3.11.0-26-generic Status: install ok installed

The default location of kernel headers on Debian, Ubuntu or Linux Mint is /usr/src .

Install Kernel Headers on Fedora, CentOS or RHEL

If you did not manually upgrade the kernel, you can install matching kernel headers using yum command.

First, check if matching kernel headers are already installed on your system. The default location of kernel header files is /usr/src/kernels/ .

If no matching kernel headers are found in that directory, go ahead and install kernel headers with yum command as follows.

$ sudo yum install kernel-devel

If the kernel header files installed by the above command do not match with your current kernel, this is because your kernel is outdated. In this case, update the installed kernel to the latest by running the following command. This will install the matching kernel automatically. You will need to reboot after updating the kernel.

Now verify that matching kernel headers are installed by running:

arch firmware ipc Makefile samples System.map vmlinux.id block fs Kconfig mm scripts tools crypto include kernel Module.symvers security usr drivers init lib net sound virt

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