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Leverage Ubuntu's default sudo installation to allow fine-grained control over privileged access.
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You'll find hacks showing how to do all this and more in this chapter. And if that's not enough, you can use industrial-grade encryption to protect sensitive information on your system (so if your system is stolen or otherwise compromised, the attackers won't be able to use what they findunless you used a lousy passphrase or wrote it down on a piece of paper). You can protect your network with a firewall to make it even harder for intruders to gain access. But even with these practices under your belt, there's more you can do. You'll also learn how to configure your system to download and install security updates, so you can take advantage of the Linux community's famously quick responses to security flaws.
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In this chapter, you'll learn about how Ubuntu relies on sudo to keep root privileges at the minimum needed to keep the system running smoothly. This chapter collects a number of hacks that will make you a better steward of your Ubuntu systems. However, the truth is that any given Linux system is more likely to be secure only when it's in good hands. When you hear stories about how much more secure Linux is than other operating systems, it can be tempting to rest easy. Ubuntu Hacks: Tips & Tools for Exploring, Using, and Tuning Linux (2009) Chapter 7.
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