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Linux All-in-One For Dummies, 5th Edition by Emmett Dulaney

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Chapter 2

Securing Linux

In This Chapter

arrow Securing passwords on your Linux system

arrow Protecting the system’s files and directories

arrow Using GnuPG to encrypt and sign files

arrow Monitoring the security of your system

arrow Hardening Internet services

arrow Using Secure Shell for secure remote logins

arrow Setting up simple firewalls and enabling packet filtering

To secure your Linux system, you have to pay attention to both host security and network security. The distinction between the two types of security is somewhat arbitrary because securing the network involves securing the applications on the host that relate to what Internet services your system offers.

This chapter first examines host security and then explains how you can secure network services (mostly by not offering unnecessary services), how you can ...

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