Unix

Learning Unix for OS X: Going Deep With the Terminal and by Dave Taylor

By Dave Taylor

Imagine your Mac is strong now? writer Dave Taylor exhibits you the way to get even more out of your method by way of tapping into Unix, the powerful working approach hid underneath OS X’s attractive consumer interface. Mountain Lion places greater than one thousand Unix instructions at your fingertips - for locating and coping with documents, remotely having access to your Mac from different desktops, and utilizing a number of freely downloadable open resource purposes. Take a pleasant journey of the Unix command line and 50 of the main valuable utilities, and quick the right way to achieve genuine keep an eye on over your Mac.

• Get your Mac to do just what you will want, should you want
• Make adjustments in your Mac’s filesystem and directories
• Use Unix’s locate, find, and grep instructions to find documents containing particular information
• Create targeted "super-commands" to accomplish initiatives that you simply specify
• Run a number of Unix courses and methods on the related time
• set up the X Window method and get a brief journey of the simplest X11 applications
• the right way to take even higher good thing about Unix in your Mac

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Extra info for Learning Unix for OS X: Going Deep With the Terminal and Shell

Sample text

But if you enter the following command: $ vi /Users/john/Documents/report a report file is created in your Documents directory—all without your having to change from your current working directory. You’ll learn more about this when I cover path‐ names, later in this chapter. If you have more than one Terminal window open, each shell has its own working directory. Changing the working directory in one shell doesn’t affect other Terminal windows. You can find out your working directory at any time by entering the pwd command: $ pwd /Users/taylor $ The Directory Tree All directories in OS X are organized into a hierarchical structure that you can imagine as a family tree.

This handy feature can save you a lot of retyping of common commands. As with many things in Unix, though, there are several different ways to do this; I don’t have room to show and explain them all, but you can get more information from the sources listed in Chapter 10. 28 | Chapter 2: Using the Terminal After you’ve typed and executed several commands, try pressing the up arrow key on your keyboard. You will see the previous command after your shell prompt, just as you typed it. Pressing the up arrow key again recalls the command before that one, and so on.

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. The default prompt in bash is the computer name (which might be something auto‐ matically generated, such as dhcp-254-108, or a name you’ve given your system), the current directory (which might be represented by ~, Unix’s shorthand for your home directory), your login name, and a dollar sign. For example, the complete prompt might look like this: Dave-Taylors-MacBook-Pro:~ taylor$.

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