Nothing is 100%.
READ IN FULL: http://www.pcworld.com/article/2859122/your-linux-pc-isnt-as-secure-as-you-think-it-is.html
It’s been an apocalyptic year for Linux security, with a sophisticated Trojan and security holes over 20 years old. The Shellshock bug left Linux desktops and servers wide open for anyone to own. Security updates fixed these problems—but you may not even be getting those patches.
Security revelations in 2014 shattered the myth of Linux impenetrability. No, the sky isn't falling, and yes, Linux is still inherently more secure than Windows—but this year proved that Linux lovers still need to pay at least some attention to their system’s protection.
READ IN FULL: http://www.pcworld.com/article/2859122/your-linux-pc-isnt-as-secure-as-you-think-it-is.html