Technical data

Using Command History

To list keywords or arguments, enter a question mark (?) in place of a keyword or

argument. Include a space before the ?. This form of help is called command syntax

help, because it reminds you which keywords or arguments are applicable based on

the command, keywords, and arguments you already have entered.

The prompt displayed depends on the configuration mode.

You can abbreviate commands and keywords to the number of characters that allow

a unique abbreviation. For example, you can abbreviate the configure terminal

command to config t.

Entering the help command will provide a description of the help system. This is

available in any command mode.

Using Command History

The CLI provides a history of commands that you have entered during the session.

This is useful in recalling long and complex commands, and for retyping commands

with slightly different parameters. To use the command history feature, you can

perform the following tasks:

 Set the command history buffer size

Table 1: Examples of Help Commands

Command Purpose

(prompt)# help Displays a brief description of the help system.

(

prompt) # abbreviated-command?

Lists commands in the current mode that begin

with a particular character string.

(

prompt)# abbreviated-com-

mand<Tab>

Completes a partial command name

(

prompt)# ?

Lists all commands available in command

mode

(

prompt)# command?

Lists the available syntax options (arguments

and keywords) for the command.

(

prompt)# command keyword ?

Lists the next available syntax for this com-

mand.