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In this section of the course,

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we're going to start covering domain two, security,

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and specifically objective 2.2,

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which focuses on users and groups.

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Objective 2.2 states that given a scenario,

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you must implement identity management.

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That's right, this section is all about users and groups.

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We're going to start out talking

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about the superuser or the root user,

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then we're not only going to discuss but also demonstrate

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how to create, modify and delete users and groups

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from our Linux system.

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After that, you're going to learn how to query users in groups

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across the system and how to configure account profiles.

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As I said, you won't just be learning the theory here,

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but I'm also going to be showing you how to use the commands

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associated with performing all these different actions

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in the demo environment.

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So this is a way we're going to work

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as we go through all the pace of the course

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I'm first going to discuss how these things work,

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and then Jamari is going to take you

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into a live demonstration on a Linux system

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to see how you can execute these things in the shell.

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So if you haven't already installed CentOS for yourself,

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I recommend you pause the video now,

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go back and install your own Linux operating system now

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so you can follow along with the demonstrations.

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There is no better way to gain experience with Linux

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than to actually enter these commands yourself,

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and practice them hands on in your own environment.

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So if you've installed your copy of CentOS already,

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let's dive into our lessons on users and groups.