Preface xiii
What TypographicChanges and Symbols Mean

Section TableP-1, “Typographic Conventions describes the typefaces and

symbols used in this book.

TableP-1 TypographicConventions
Typefaceor
Symbol Meaning Example
AaBbCc123 The names of commands, files,
and directories; on-screen
computer output
Edit your.login file.
Use ls -a to list all files.
system% You have mail.
AaBbCc123 What you type, contrasted with
on-screen computer output system% su
Password:
AaBbCc123 Command-line placeholder:
replace with a realname or
value
Todelete a file, type rm filename.
AaBbCc123 Booktitles, new words or terms,
or words to be emphasized Read Chapter 6 in User’s Guide.
These are called class options.
You must be root to do this.
Code samples are included in boxes and may display the following:
%UNIX C shell prompt system%
$UNIX Bourne and Korn shell
prompt UNIX Bourne and Korn shell
prompt
#Superuser prompt, all shells Superuser prompt, all shells