A recent study Linux Driver related books, in order to better understand the text content, I installed Win10 / Ubuntu dual system (Windows boot).
After installing the system, I wrote a very simple example on ubunt, test insmod / rmmod command.
But encountered a problem, it has prompted inmod do not have permission to study for several days, because there is no VPN, in our country the famous search engine for help, but little useful information and no.
Later staged a VPN, find a useful introduction in Google.
The reason is that my system at Security boot mode, let's insmod module. Because my Windows is bootable, so the need to enter the BIOS, the security boot mode to disable swap.