安装RPM包时候缺少依赖，现在可以尝试使用yum localinstall + RPM包的方式解决，
以下方法只在Centos7上测试过。
[root@CentOS ~]# yum localinstall VirtualBox-6.0-6.0.8_130520_el7-1.x86_64.rpm
Loaded plugins: fastestmirror
Examining VirtualBox-6.0-6.0.8_130520_el7-1.x86_64.rpm: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
Marking VirtualBox-6.0-6.0.8_130520_el7-1.x86_64.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package VirtualBox-6.0.x86_64 0:6.0.8_130520_el7-1 will be installed
--> Processing Dependency: libGL.so.1()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
Loading mirror speeds from cached hostfile
* base: mirrors.cn99.com
* epel: fedora.cs.nctu.edu.tw
* extras: mirrors.cn99.com
* updates: mirrors.aliyun.com
--> Processing Dependency: libICE.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libSDL-1.2.so.0()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libSM.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libX11-xcb.so.1()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libX11.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libXcursor.so.1()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libXext.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libXmu.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libXrender.so.1()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
--> Processing Dependency: libXt.so.6()(64bit) for package: VirtualBox-6.0-6.0.8_130520_el7-1.x86_64
............
