Bash Pocket Reference: Help for Power Users and Sys Admins by Arnold Robbins

Bash Pocket Reference: Help for Power Users and Sys Admins by Arnold Robbins

By Arnold Robbins

It’s easy: in order to have interaction deeply with Mac OS X, Linux, and different Unix-like structures, you want to understand how to paintings with the Bash shell. This concise little publication places the entire crucial information regarding Bash correct at your fingertips.

You’ll fast locate solutions to the aggravating questions that quite often arise whilst you’re writing shell scripts: What characters do you want to cite? How do you get variable substitution to just do what you will have? How do you utilize arrays? up to date for Bash model 4.4, this ebook has the solutions to those and different difficulties in a structure that makes shopping speedy and easy.

Topics include:

  • Invoking the shell
  • Syntax
  • Functions and variables
  • Arithmetic expressions
  • Command history
  • Programmable completion
  • Job control
  • Shell options
  • Command execution
  • Coprocesses
  • Restricted shells
  • Built-in commands
  • Source: Amazon Retail AZW3

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    Additional resources for Bash Pocket Reference: Help for Power Users and Sys Admins (2nd Edition)

    Sample text

    Many of these programs are not "pure" Unix programs, in that they make use of proprietary Mac OS X features such as the Aqua interface. Still, many take advantage of the Unix core of Mac OS X, and so this site is a good place to explore. Chapter 2. Using the Command Line The command line is the primary interface to Unix. While there are many graphical interfaces for Unix systems, the command-line interface gives you the greatest control over the system. Furthermore, the command-line interface is virtually identical on every Unix system you are likely to use, from Mac OS X to Linux, FreeBSD, and Solaris.

    Experiment with different colors and font sizes for the text and background in Terminal. For example, we prefer 12-point bright green text on a black background because it looks like the screen on an "old-fashioned" computer terminal. • Open more than one Terminal window (by clicking New Shell in the File menu), and give each one a different color scheme as a way to differentiate them. You can have as many Terminal windows open as you like. Other ways to get to the command line Using Terminal is by far the most common way to get to the Mac OS X command line, but there are other ways that are useful after you have become proficient in using Unix.

    In particular, Unix has no fundamental concept of a file's "type" or "creator" (Mac OS X does, but only for files that were created with Mac file information). Unix's filename extensions indicate a file's type. This is not as powerful as the Macintosh approach, but it is the standard in the Unix world. ) Mac OS X tries to have it both ways and, in the Mac spirit, uses the old Mac approach in some cases and the standard Unix approach in other cases. But in order to play well with others, Mac OS X incorporates filename extensions.

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