Cisco Systems 78-13983-04 manual Cisco IOS Software Basics, Getting Help

C H A P T E R 3

Cisco IOS Software Basics

This chapter describes what you need to know about the Cisco IOS software before you configure the router using the command-line interface (CLI). This chapter includes the following:

•Getting Help, page 3-1

•Understanding Command Modes, page 3-2

•Undoing a Command or Feature, page 3-3

•Saving Configuration Changes, page 3-3

•Where to Go Next, page 3-3

Understanding these concepts will save time as you begin to use the CLI. If you have never used the Cisco IOS software or need a refresher, take a few minutes to read this chapter before you proceed to the next chapter.

If you are already familiar with the Cisco IOS software, proceed to Chapter 4, “Configuring with the Command-Line Interface.”

Getting Help

Use the question mark (?) and arrow keys to help you enter commands:

•For a list of available commands, enter a question mark:

Router> ?

•To complete a command, enter a few known characters followed by a question mark (with no space):

Router> s?

•For a list of command variables, enter the command followed by a space and a question mark:

Router> show ?

•To redisplay a command you previously entered, press the up arrow key. You can continue to press the up arrow key for more commands.

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

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