Typographic Conventions

AaBbCc123

The names of commands, files, and directories; on-screen computer output 

Edit your file. 

Use ls -a to list all files.

% You have mail.

AaBbCc123

What you type, when contrasted with on-screen computer output 

% su

Password:

AaBbCc123

Book titles, new words or terms, words to be emphasized 

Read Chapter 6 in the User's Guide.

These are called class options.

You must be superuser to do this.

Command-line variable; replace with a real name or value 

To delete a file, type rm filename.