Cisco Systems Cisco IOS XR manual Entering Abbreviated Commands

Chapter 6 CLI Tips, Techniques, and Shortcuts

CLI Tips and Shortcuts

Entering Abbreviated Commands

You can abbreviate commands and keywords to the number of characters that allow a unique abbreviation. For example, the configure command can be abbreviated as config because the abbreviated form of the command is unique. The router accepts and executes the abbreviated command.

Using the Question Mark (?) to Display On-Screen Command Help

Use the question mark (?) to learn what commands are available and the correct syntax for a command. Table 6-1summarizes the options for on-screen help.

Tip The space (or lack of a space) before the question mark (?) is significant. If you include a space before the question mark, the system displays all available options for a command or CLI mode. If you do not include a space, the system displays a list of commands that begin with a particular character string.

Table 6-1 On-Screen Help Commands

Command	Description
partial-command?	Enter a question mark (?) at the end of a partial command to list the commands that begin with those
	characters.
	RP/0/RP0/CPU0:router# co?
	configure copy
	Note Do not include a space between the command and question mark.
?	Lists all commands available for a particular command mode.
command ?	Include a space before the question mark (?) to list the keywords and arguments that belong to a
	command.
	RP/0/RP0/CPU0:router# configure ?
	exclusive	Configure exclusively from this terminal
	terminal	Configure from the terminal
	<cr>
	Note For most commands, the <cr> symbol indicates that you can execute the command with the
	syntax already entered. For the preceding example, press Return to enter global configuration
	mode.
command keyword ?	Enter a question mark (?) after the keyword to list the next available syntax option for the command.
	RP/0/RP0/CPU0:router# show aaa ?
	taskgroup	Show all the local taskgroups configured in the system
	userdb	Show all local users with the usergroups each belong to
	usergroup	Show all the local usergroups configured in the system
	Note Include a space between the keyword and question mark.
	The following example shows how to add an entry to access list 99. The added entry denies access to all
	hosts on subnet 172.0.0.0 and ignores bits for IPv4 addresses that start within the range of 0 to 255. The
	following steps provide an example of on-screen command help:

Cisco IOS XR Getting Started Guide

6-2 OL-10957-02