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In this chapter, we’ll take a look at the various different types of shell commands that exist and how this can affect your work. By the end of this chapter, you might even be able to make sense of the horrifying and perfectly syntactically valid code below: which $(where $(what $(whence $(whereis who)))) Part 1: Navigating the Command Line Part 2: Become a Clipboard Gymnast Part 3: Getting Help Part 4: Moving Around Part 5: Interlude - Understanding the Shell Part 6: Everything You Don’t Need to Know About Job Control Part 7: The Subtleties of Shell Commands What Are Commands?

Job control is a feature of most shells, which is generally not particularly intuitive to work with. However, knowing the basics can help prevent you from getting yourself into a tangle, and can from time to time make certain tasks a little easier. In this chapter, we’ll look at the main features of job control, why it can be a problematic, and some alternatives. Part 1: Navigating the Command Line Part 2: Become a Clipboard Gymnast Part 3: Getting Help Part 4: Moving Around Part 5: Interlude - Understanding the Shell Part 6: Everything You Don’t Need to Know About Job Control Part 7: The Subtleties of Shell Commands What Is Job Control?