By Arnold Robbins

ISBN-10: 1491941545

ISBN-13: 9781491941546

It’s uncomplicated: as a way 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 speedy locate solutions to the irritating questions that often arise while you’re writing shell scripts: What characters do you want to cite? How do you get variable substitution to do just what you will have? How do you utilize arrays? up-to-date for Bash model 4.4, this publication has the solutions to those and different difficulties in a layout that makes searching quickly 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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    Extra resources for Bash Pocket Reference: Help for Power Users and Sys Admins (2nd Edition)

    Example text

    There is usually more than one way to specify a path to a particular file, a very Unix-y characteristic. , which always refers to the current directory. That舗ll become more important later in the book when you want to specify a shell script in the current directory, not one in the PATH. We舗ll explain this in more detail soon. Displaying Your Working Directory: The pwd Command The pwd command is used to help you 舠get your bearings舡 by telling you the name of your current working directory. 3. The directory that you are placed in after you log in to the system is called your home directory.

    You can remove either of the two linked files at any time, and the other will not be removed: Click here to view code image $ rm writeback $ ls -l total 4 -rwxr-xr-xŠŠŠŠ1 steveŠŠŠŠDP3725ŠŠŠŠŠ358 Jun 25 13:31 collect -rwxr-xr-xŠŠŠŠ1 steveŠŠŠŠDP3725ŠŠŠŠ1219 Jun 25 13:31 mon -rwxr-xr-xŠŠŠŠ1 steveŠŠŠŠDP3725ŠŠŠŠŠŠ89 Jun 25 13:30 wb $ Note that the number of links on wb went from 2 to 1 because one of its links was removed. Most often, ln is used to allow a file to appear in more than one directory simultaneously.

    For additional information about the settings and features on your reading device or app, visit the device manufacturer舗s Web site. Many titles include programming code or configuration examples. To optimize the presentation of these elements, view the e-book in single-column, landscape mode and adjust the font size to the smallest setting. In addition to presenting code and configurations in the reflowable text format, we have included images of the code that mimic the presentation found in the print book; therefore, where the reflowable format may compromise the presentation of the code listing, you will see a 舠Click here to view code image舡 link.

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    Bash Pocket Reference: Help for Power Users and Sys Admins (2nd Edition) by Arnold Robbins

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