Cisco Systems 3750E manual Understanding Abbreviated Commands, Command ?, Command keyword ?

Chapter 2 Using the Command-Line Interface

Understanding Abbreviated Commands

Table 2-2 Help Summary (continued)

Command	Purpose
?	List all commands available for a particular command mode.
	For example:
	Switch> ?
command ?	List the associated keywords for a command.
	For example:
	Switch> show ?
command keyword ?	List the associated arguments for a keyword.
	For example:
	Switch(config)# cdp holdtime ?
	<10-255> Length of time (in sec) that receiver must keep this packet

Understanding Abbreviated Commands

You need to enter only enough characters for the switch to recognize the command as unique.

This example shows how to enter the show configuration privileged EXEC command in an abbreviated form:

Switch# show conf

Understanding no and default Forms of Commands

Almost every configuration command also has a no form. In general, use the no form to disable a feature or function or reverse the action of a command. For example, the no shutdown interface configuration command reverses the shutdown of an interface. Use the command without the keyword no to re-enable a disabled feature or to enable a feature that is disabled by default.

Configuration commands can also have a default form. The default form of a command returns the command setting to its default. Most commands are disabled by default, so the default form is the same as the no form. However, some commands are enabled by default and have variables set to certain default values. In these cases, the default command enables the command and sets variables to their default values.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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