Typographic Conventions

AaBbCc123

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

Edit your .login file.

Use ls -a to list all files.

machine_name% you have mail.

AaBbCc123

What you type, contrasted with on-screen computer output 

machine_name% su

Password:

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.