Conventions Used in This Book
This book uses conventions to make its
Red Hat Linux
In this book, the
Text and examples
The text is set in this type, whereas examples are shown in a
$ cat practice This is a small file I created with a text editor.
Items you enter
Everything you enter at the keyboard is shown in a bold typeface: Within the text,
this bold typeface
is used; within examples and screens,
is used. In the previous example, the dollar sign ($) on the first line is a prompt that Linux displays, so it is not bold; the remainder of the first line is entered by a
Names of utilities are printed in this bold sans serif typeface . This book references the emacs text editor and the ls utility or ls command (or just ls ) but instructs you to enter ls a on the command line. In this way the text distinguishes between utilities, which are programs, and the instructions you give on the command line to invoke the utilities.
Filenames appear in a bold typeface. Examples are
Within the text,
Buttons and labels
Words appear in a bold typeface in the sections of the book that describe a GUI. This font indicates that you can click a mouse button when the mouse pointer is over these words on the screen or over a button with this name.
Keys and characters
This book uses SMALL CAPS for three kinds of items:
Prompts and RETURNs
Most examples include the
the signal that Linux is waiting for a commandas a dollar sign (
Examples omit the RETURN keystroke that you must use to execute them. An example of a command line is
$ vim memo.1204
To use this example as a model for running the
text editor, give the command
and press the
to exit from
; see page 152 for a
tutorial.) This method of entering commands makes the examples in the book
The menu selection path is the name of the menu or the location of the menu, followed by a
All glossary entries marked with
URLs (Web addresses)
Web addresses, or URLs, have an implicit
Tip, caution, and security boxes
The following boxes highlight information that may be helpful while you are using or
Tip: This is a tip box
A tip box may help you avoid repeating a common mistake or may point toward additional information.
Caution: This box warns you about something
A caution box warns you about a potential pitfall.
Security: This box marks a security note
A security box highlights a potential security issue. These notes are usually for system administrators, but some apply to all users.