What Typographic Changes and Symbols Mean

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

Command-line placeholder: 

replace with a real name or value 

To delete a file, type rm filename.

AaBbCc123

Book titles, 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 

system$

#

Superuser prompt, all shells 

system#