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Beginning Ubuntu Linux, Fifth Edition by Sander van Vugt, Andy Channelle, Trevor Parsons, Keir Thomas, Emilio Raggi

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C H A P T E R  8

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How to Secure Your Computer

Linux is widely considered one of the most secure operating systems available. On a basic level, Linux is built from the ground up to be fundamentally sound, and it allows users to work securely without their even noticing it. For instance, it enforces the system of ordinary users who are limited in what they can do, thus making it harder for security breaches such as virus infections to occur.

In addition, Linux contains a firewall that is hardwired into the kernel, called iptables (http://www.netfilter.org). The firewall is considered among the best solutions by practically all computer security ...

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