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Advanced Programming in the UNIX(R) Environment by W. Richard Stevens

By W. Richard Stevens

For greater than two decades, severe C programmers have depended on one publication for functional, in-depth wisdom of the programming interfaces that force the UNIX and Linux kernels: W. Richard Stevens’ complex Programming within the UNIX® surroundings . Now, once more, Rich’s colleague Steve Rago has completely up to date this vintage paintings. the hot 3rd variation helps today’s prime systems, displays new technical advances and top practices, and aligns with model four of the one UNIX Specification.

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For example, the upward-facing diagonal arrow for View→Scroll to Top is the Top or Home key on your keyboard, and the downwardfacing diagonal arrow for View→Scroll to Bottom is the End key. You can move up a page with View→Page Up (or ⌘-Page Up), and down a page with View→Page Down (or ⌘-Page Down). To move up or down lines, use ⌘-up arrow or ⌘-down arrow, as needed. 26 | Chapter 2: Using the Terminal The Shell Prompt When the system is ready to run a command, the shell outputs a prompt to tell you that you can enter a command.

How can you tell it what job you want done? Do you give instructions before the program starts, or after it’s started? There are several general ways to run programs on an OS X system, and it’s good to be aware of them: Graphical programs Some programs work only within the graphical window environment. On OS X, you can run these programs using the open command. For instance, when you type open -a Chess at a command prompt, the Chess application (/Applications) launches and opens one or more windows on your screen.

For example, to change directories to the root level of your hard drive, use the follow‐ ing command: $ cd / For more information on the filesystem’s structure and the root directory, see “The Directory Tree” on page 43. Your Working Directory Your working directory (also called your current directory) is the directory in which you’re currently working. Every time you open a new Terminal window, your home directory is your working directory. When you change to another directory, the directory you move to becomes your working directory, and so on.

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