[root@localhost ~]# cd Desktop
[root@localhost Desktop]# ./VirtualBox_1.3.8_Linux_x86.run install
Verifying archive integrity... All good.
Uncompressing VirtualBox for Linux installation........
VirtualBox Version 1.3.8 (Tue Mar 13 19:35:24 CET 2007) installation
Please install the build and header files for your current Linux kernel.
The current kernel version is 2.6.20-1.2944.fc6
<b style="color:black;background-color:#ffff66">Please install the GNU compiler</b>.
Problems were found which would prevent VirtualBox from installing.
Please correct these problems and try again.
[root@localhost Desktop]#