On January 18, 2017 8:18:46 PM GMT+01:00, "Herminio Hernandez, Jr." 
<herminio.hernande...@gmail.com> wrote:
>You need to mount the 'guest-additions-iso' in your VM. If you go to to
>the
>device drop down you should see that option there. Then run the Linux
>script in the CD, then reboot. You should get full screen.
>
>On Wed, Jan 18, 2017 at 12:12 PM, <meino.cra...@gmx.de> wrote:
>
>> Hi,
>>
>> I am relatively new to the world of virtualboxing (NOT
>> "virtual boxing" ! :)
>> so my question may be stupid (tm)...
>>
>> I installed Virtualbox  5,1,12. and installed a Linux
>> distro into a hard disk drive image. Finally the image
>> boots and now I have a "Linux in a (vitual) box" NICE!
>>
>> But: The size of the inner window fame of virtualbox  is always
>smaller
>> than
>> what the Linux inside thinks is the size of the monitor.
>>
>> So I never get the whole desktop...
>>
>> Is it possible to fix this without reinstalling the complete Linux?
>>
>> Thanks a lot for any resizing help :) in advance!
>> Cheers
>> Meino
>>
>>
>>
>>
>>
>>

Some things to check for that:
You need the following tools installed:
- gcc
- make
- kernel sources
- kernel headers

And you need a symlink '/usr/src/linux' pointing to the sources.
The sources and headers need to be the same version as the running kernel.

These are not always available or set up correctly by default. Centos 7 needed 
some manual fixing when I installed in a VM it last week.

--
Joost
-- 
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