New PDF release: A Basic UNIX Tutorial

By Byrd J.

This instructional contains fourteen sections, each one of which addresses a basic point of UNIX computing. It concentrates on illustrating the primary innovations by means of delivering brief factors, besides examples, and workouts.

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Extra info for A Basic UNIX Tutorial

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Quitting emacs To exit emacs and return to the Unix shell, type Control-X-Control-C. If you have made changes to the buffer since the last time you saved it to disk, emacs will ask you if you want to save. Type y for yes, or n for no. Getting help Emacs has an on-line help system that can be invoked by typing Control-H. ), emacs will present a list of help topics you can choose. The emacs display The display in emacs is divided into three basic areas. The top area is called the text window. The text window takes up most of the screen, and is where the document being edited appears.

The getty process The getty process provides the login: prompt that you see on the terminal screen. The getty process reads your username, and invokes the login program. The login program The login program receives the username from getty, and prompts you for your password. Login then consults the system database /etc/passwd to verify your password. (Note that login will request your password even if there is no entry in /etc/passwd for the username you've given. ) Login turns off terminal echo so that your password is not displayed on the screen.

Deleting text is easy. As you'd expect, the delete key deletes backward one character. Here are some other ways to delete text: ● ● ● ● Control-D deletes forward one letter. Control-K deletes from the point to the end of the line. ESCAPE-D deletes forward one word. ESCAPE-delete deletes backward one word. Cutting and pasting text regions Emacs allows you to select a region of text, and perform cut and paste operations on the region. It uses a temporary storage area called the "kill buffer" to allow you to store and retrieve blocks of text.

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A Basic UNIX Tutorial by Byrd J.

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