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Unix Security

Unix has many built-in security features to help protect your files and your computer. In the first half of this chapter, I cover the following security features:

  • Passwords enable you to protect your computer from unauthorized access.

  • File and directory permissions enable you to specify which users or groups can access individual files and directories.

  • Users and groups enables you to specify access privileges for individual users and groups of users.

  • Information commands enable you to see who has accessed your computer and what they did.

Tip

  • This chapter builds on the information in Chapter 3. To get the most out of this chapter, please make sure you read and understand the information in Chapter 3 before moving on to this one.


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