After the deployment of your first Linux virtual machine (VM), let's log in, discuss some basic Linux commands, and learn how to find our way in the Linux environment. This chapter is about basic Linux administration, starting with the Linux shell, which is used to interact with the Linux system. We'll discuss how to use the shell to accomplish our day-to-day administration tasks, such as accessing the filesystem, managing processes such as starting and killing programs, and many other things.

In the last part of this chapter, we'll discuss the Discretionary Access Control (DAC) model and how to create, manage, and verify users and groups in Linux and get permissions for files and directories based on the username and group membership. We'll also cover changing file ownership for a user/group and changing and verifying basic permissions and access control lists.

Here are the key topics of this chapter:

• Interacting...