I am trying to install VirtualBox on my Ubuntu. 

I first tried to `sudo apt-get install virtualbox-ose` in a terminal, but after the configuration step, it fails with [an error](https://askubuntu.com/questions/49052/the-character-device-dev-vboxdrv-does-not-exist):

> 
> No suitable module for running kernel found
>  When proceeding with starting `virtualbox`, I get this error:
>  WARNING: The character device /dev/vboxdrv does not exist.
>  Please install the virtualbox-ose-dkms package and the appropriate
>  headers, most likely linux-headers-generic.
> 
> 
> You will not be able to start VMs until this problem is fixed.
> 
> 
> 

So I tried the package from <http://www.virtualbox.org/>, but starting VirtualBox fails with:

> 
> WARNING: The vboxdrv kernel module is not loaded. Either there is no module
>  available for the current kernel (2.6.38-8-generic-pae) or it failed to
>  load. Please recompile the kernel module and install it by
> 
> 
> 
> ```
>   sudo /etc/init.d/vboxdrv setup
> 
> ```
> 
> You will not be able to start VMs until this problem is fixed.
> 
> 
> 

So I ran `sudo /etc/init.d/vboxdrv setup`, but it fails too:

```
* Stopping VirtualBox kernel modules                                                           [ OK ] 
* Uninstalling old VirtualBox DKMS kernel modules                                                            [ OK ] 
* Trying to register the VirtualBox kernel modules using DKMS                                                       
Error! Your kernel headers for kernel 2.6.38-8-generic-pae cannot be found at
/lib/modules/2.6.38-8-generic-pae/build or /lib/modules/2.6.38-8-generic-pae/source.

* Failed, trying without DKMS
* Recompiling VirtualBox kernel modules                                                                             
* Look at /var/log/vbox-install.log to find out what went wrong

```

[The contents of `/var/log/vbox-install.log`](http://paste.ubuntu.com/627992/).

As I am stuck, I also tried to install `kernel-devel` with `yum`, still fruitless:

```
root@ubuntu# yum install kernel-devel
Setting up Install Process
No package kernel-devel available.
Nothing to do

```

Now I've no idea how to correct this. Any ideas?