14.1.2 Notation of document and method for execution of sample network

An operation example of the description is shown in the rectangular region. $>$ on the line head indicates a command prompt. The part of the operation example indicates an input from the user, and the second line indicates a message from the system. In the following example, ">" in the first line indicates a command prompt.

> echo Hello World!
 Hello World!

Note that the prompt is displayed in different ways (e.g. "%", "$") according to operating environments. The letters that come after the prompt in the first line are the letters entered by the user. In the above example, the seventeen letters of echo "HelloWorld!" are the letters entered by the user. Press the enter key at the end of line. The letters in the second line are the output from the system, which are displayed as pressing the enter key at the end of the first line.