Users, Groups, and Permissions in Linux
Lesson 1 of 1
  1. 1
    Introduction
    Linux is a highly secure operating system. How? This lesson will dig into the way that Linux handles users, groups, and permissions to keep information secure. Linux is designed from the ground up…
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  2. 2
    Types of Linux Users
    Again, Linux is a highly secure operating system that depends on strict file permissions dictating which users and groups can access them. Let’s look at some classifications of users that are found…
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  3. 3
    Users and Groups in Linux
    Now that we’ve covered how different Linux users can coexist, let’s learn about users, groups, and their IDs! On a Linux system, all users added are assigned a name, unique user identification (UI…
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  4. 4
    File Permissions in Linux
    How do users and groups relate to what files they can access? If we use the command ls -l on a working directory, we will see directory/file permissions, user, group, filesize, creation date/time,…
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  5. 5
    Elevating Privileges (sudo)
    Good security practices suggest that administrator/root access be limited. Typical day-to-day activities such as word processing, web browsing, or listening to music should never be done using the …
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  6. 6
    Modifying Users, Groups, and Permissions
    Linux provides users the ability to elevate or relax access permissions on any files where they are an owner. Of course, an administrator can make changes anywhere in the system, including creating…
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  7. 7
    Review
    We now have a fairly good idea of how Linux provides resource security by separating administrator accounts from non-administrator accounts and then further applying specific user and group permiss…
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