Will logging into root and invoking a virus is a sure way to lunch it. Mainly
you got to invoke the virus to get to run. However, there many different kernels
of Linux. It would be very difficult to get a virus to attack if at all.
Depending on the distro of Linux. The average kernel updates is every six
months. To get a Linux virus to attack the Linux kernel. The Virus has to go
through lots of hall ways, doors, bedrooms, bathrooms, kitchen, and still can't
find the source of the family room.
Not like Windows. Soon as the virus busted down the door, it is at the kernel,
and the virus is running amok with the families daughter.
Basically Linux is compiled with some many lines of code. Then you add a
desktop environment like KDE or Gnome. Then you add programs layered on top of
the kernel like GNU, Python, C++, BASIC, and etc. Hacking into a Linux computer
can be just as difficult.