"You read this right, there is no way in the world that any OS,
even Ubuntu Linux, is going to provide you 100 percent protection
against silly user mistakes or outward malware aimed at creating
problems for your computer.
"To this day, there are simple one-line commands I can convince
most people to click on, in a script form, that will hose their
installation of Ubuntu. If that’s not considered malware,
then I don’t know what is. Clearly, being aware of what you
are installing, executing or clicking on from the Web remains as
important as it does in Windows."