Download PDF by Robb Tracy: Linux+ Certification Study Guide

By Robb Tracy

ISBN-10: 0071596615

ISBN-13: 9780071596619

Designed for first-time and skilled clients, this publication describes the UNIX(R) programming atmosphere and philosophy intimately. Readers will achieve an realizing not just of ways to take advantage of the procedure, its elements, and the courses, but in addition how those healthy into the full environment.В книге американских авторов - разработчиков операционной системы UNIX - блестяще решена проблема автоматизации деятельности программиста, системной поддержки его творчества, выходящей за рамки языков программирования. Профессионалам открыт богатый "встроенный" арсенал системы UNIX. Многочисленными примерами иллюстрировано использование языка управления заданиями shell. Для программистов-пользователей операционной системы UNIX.

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FIGURE 1-2 Firewalls block or allow traffic based on rules. fic af Tr ed w llo A Allowed Traffic Di sal Firewall Rules low ed Tr af fic Use the Linux User Interface 15 SCENARIO & SOLUTION You need to implement Linux as a file server in your network. What software should be installed to make it fill this role? You have two choices. You can install and use NFS to provide Network File System access. NFS works great for Linux or UNIX client systems. However, it doesn’t work as well for Windows clients.

On most systems, this will be /bin/bash. 4. Open an alternate console window by pressing alt-f2. A new login prompt is displayed. 5. Authenticate again to the system. 6. Return to the first console screen by selecting alt-f1. 7. Load the zsh shell by entering zsh at the prompt. 8. Return to your default shell by entering exit at the prompt. Now that you know how to access your shell, let’s talk about how you use it to run programs. Running Commands at the Shell Prompt Running a program or command from the shell prompt is relatively easy.

In the figure above, the bash shell is the default shell for the rtracy user account, as indicated by the SHELL variable. However, you’re not stuck with the default shell. If you want to switch to a different shell, simply enter the shell command at the prompt. For example, if you are currently using the bash shell and want to use zsh instead, simply enter zsh at the prompt. This is shown in the following illustration. To stop using the new shell and revert back to the original shell, simply enter exit, as shown next.

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Linux+ Certification Study Guide by Robb Tracy


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