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- See this Wikipedia article on Linux Malware

- Unix-based operating systems, like Ubuntu and Mac OSX, have never had the pervasive virus infections experienced by Windows users.

- One reason is the way Linux systems, like Ubuntu, handle

file permissions

.

- The system of

file permissions

makes it very, very difficult for a virus to get established.

- In total there have been approximately 50

viruses

targeted at Linux-based operating systems.

- By comparison there are over 120,000

viruses

that currently target Windows-based computers.

- Ubuntu does not let everyone be the Administrator which is a key security flaw in Windows systems.

- Ubuntu is

naturally resistant to viruses

in part because hackers don't target it.

- While Ubuntu comes with lots of software anti-virus software is not included.