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### 2.1 Assumptions this Tutorial Makes

This chapter is paced to allow beginners to learn about `tar` slowly. At the same time, we will try to cover all the basic aspects of these three operations. In order to accomplish both of these tasks, we have made certain assumptions about your knowledge before reading this manual, and the hardware you will be using:

- Before you start to work through this tutorial, you should understand what the terms “archive” and “archive member” mean (see Definitions). In addition, you should understand something about how Unix-type operating systems work, and you should know how to use some basic utilities. For example, you should know how to create, list, copy, rename, edit, and delete files and directories; how to change between directories; and how to figure out where you are in the file system. You should have some basic understanding of directory structure and how files are named according to which directory they are in. You should understand concepts such as standard output and standard input, what various definitions of the term ‘`argument`’ mean, and the differences between relative and absolute file names.
- This manual assumes that you are working from your own home directory (unless we state otherwise). In this tutorial, you will create a directory to practice `tar` commands in. When we show file names, we will assume that those names are relative to your home directory. For example, my home directory is `/home/fsf/melissa`. All of my examples are in a subdirectory of the directory named by that file name; the subdirectory is called `practice`.
- In general, we show examples of archives which exist on (or can be written to, or worked with from) a directory on a hard disk. In most cases, you could write those archives to, or work with them on any other device, such as a tape drive. However, some of the later examples in the tutorial and next chapter will not work on tape drives. Additionally, working with tapes is much more complicated than working with hard disks. For these reasons, the tutorial does not cover working with tape drives. See Media, for complete information on using `tar` archives with tape drives.

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