Additional step in order to install guest additions

[lucas-varela]

I couldn't get guest additions to properly install until I installed kernel-headers and kernel-devel using the current Linux kernel version. The guide doesn't actually mention that, so I suppose this may help anyone that may find this problem as well.

Install them using:
sudo yum install -y kernel-headers-`uname -r`
sudo yum install -y kernel-devel-`uname -r`

Notice the backticks around uname -r, they're important.

If anyone happen to face this problem, please comment, so I can make a PR adding this info.

[poflynn]

So the line in the README doesn't work?

sudo yum -y install kernel-headers kernel-devel

https://github.com/poflynn/AMZN2Vagrant/blob/master/README.md#installing-virtualbox-guest-additions

[lucas-varela]

For me, it didn't. I had to install the kernel package specific to my kernel version.