error fix when installing virtualbox on oracle linux 7

#sudo /sbin/rcvboxdrv setup

/sbin/rcvboxdrv: line 85: /etc/init.d/functions: No such file or directory

#ln -s /etc/rc.d/init.d/functions /etc/init.d/functions

#sudo /sbin/rcvboxdrv setup

Stopping VirtualBox kernel modules                         [  OK  ]

Recompiling VirtualBox kernel modules                      [  OK  ]

Starting VirtualBox kernel modules                         [  OK  ]

. install extestion pack first

#VBoxManage modifyvm "BigDataLite-4.5.0" --vrde on

#VBoxHeadless --startvm "BigDataLite-4.5.0" &

mstsc krea2.kr.oracle.com:3389

Bios setup check: Intel VT-x,” “Virtualization” on

Look for an option named “Intel Virtualization Technology,” “Intel VT-x,” “Virtualization Extensions,” “Vanderpool,” or something similar. Enable the option and select “Save and Exit” or the equivalent feature to save your settings changes and reboot your computer.