Classic Shell Scripting by Arnold Robbins, Nelson H. F. Beebe PDF

By Arnold Robbins, Nelson H. F. Beebe

ISBN-10: 0596005954

ISBN-13: 9780596005955

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Shell scripting talents by no means exit of favor. It's the shell that unlocks the true capability of Unix. Shell scripting is vital for Unix clients and method administrators-a approach to speedy harness and customise the complete energy of any Unix method. With shell scripts, you could mix the basic Unix textual content and dossier processing instructions to crunch information and automate repetitive projects. yet underneath this easy promise lies a treacherous ocean of diversifications in Unix instructions and criteria. Classic Shell Scripting is written that can assist you reliably navigate those tough waters.

Writing shell scripts calls for greater than only a wisdom of the shell language, it additionally calls for familiarity with the person Unix courses: why every one is there, the best way to use them by means of themselves, and together with the opposite courses. The authors are in detail acquainted with the information and tips that may be used to create first-class scripts, in addition to the traps which may make your most sensible attempt a foul shell script. With Classic Shell Scripting you'll steer clear of hours of wasted attempt. You'll examine not just write invaluable shell scripts, yet the best way to do it thoroughly and portably.

The skill to application and customise the shell fast, reliably, and portably to get the simplest out of anyone process is a crucial ability for a person working and holding Unix or Linux structures. Classic Shell Scripting provides every little thing you want to grasp those crucial skills.

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The Linux Foundation sponsors the work of Linus Torvalds, the creator of Linux. The Linux Foundation sponsors several working groups to define standards and participate in the development of features targeting many important Linux platform attributes. The next two sections introduce some of these initiatives. 3 Carrier-Grade Linux A significant number of the world’s largest networking and telecommunications equipment manufacturers are either developing or shipping carrier-class equipment running Linux as the operating system.

Embedded systems often have limited memory, small or no hard drives, and sometimes no external network connectivity. Frequently, the only user interface is a serial port and some LEDs. These and other issues can present challenges to the embedded system developer. 1 BIOS Versus Bootloader When power is first applied to the desktop computer, a software program called the BIOS immediately takes control of the processor. ) The BIOS might actually be stored in Flash memory (described shortly) to facilitate field upgrade of the BIOS program itself.

RAM: 0x00000000-0x04000000, 0x0001f560-0x03fd1000 FLASH: 0x500000000 - 0x51000000, 128 RedBoot> Serial Terminal FIGURE 2-2 Embedded Linux development setup For this example, our primary connection to the embedded Linux target is via the RS-232 connection. A serial terminal program is used to communicate with the target board. 2 The author has switched to using screen as his terminal of choice, replacing the functionality of minicom. It offers much more flexibility, especially for capturing traces, and it’s more forgiving of serial line garbage often encountered during system bringup or troubleshooting.

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Classic Shell Scripting by Arnold Robbins, Nelson H. F. Beebe

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