Check Requirements for Ubuntu

To check for kernel headers and install them if necessary on Ubuntu systems, perform the following steps.

When they are properly installed, the required kernel headers are located under /usr/src/linux-headers-$(uname -r)/include/.

Prerequisites

Check BPF-based Sensor Requirements

Procedure

To determine whether kernel headers are installed, run the following command:
```
$ sudo apt list linux-headers-$(uname -r)
```
If the package is installed, the output will be similar to the following. An i or i+ in the left column signifies that the package is installed.

linux-headers-<version>-generic/…
To determine whether the kernel headers are available to install, run the following command:
```
$ sudo apt search linux-headers-$(uname -r)
```
If the package is available, the output will be similar to the following:

linux-headers-<version>-generic/…
To install any necessary available kernel headers, run the following command:
```
$ sudo apt install linux-headers-$(uname -r)
```
If the kernel headers packages are not installed and are not available, update the kernel to a supported version and install the matching kernel headers.

Note: This action requires a reboot.
1. Get the kernel update tool.
```
$ sudo wget https://raw.githubusercontent.com/pimlie/ubuntu-mainline-kernel.sh/master/ubuntu-mainline-kernel.sh  
```
2. To list the available kernel versions, run the following command:
```
$ sudo ubuntu-mainline-kernel.sh -r
```
3. To install a newer supported kernel version, run the following command:
```
$ sudo ubuntu-mainline-kernel.sh -i <version>
```
4. To install kernel header packages for the new kernel version, run the following command:
```
$ sudo apt install linux-headers-<version>
```
5. To reboot into the new kernel, run the following command:
```
$ sudo reboot
```