Table Of Contents

Basic Command-Line Interface Commands

disable

editing

enable

end

exit

full-help

help

history

history size

logout

menu (EXEC)

more begin

more exclude

more include

show begin

show exclude

show history

show include

terminal editing

terminal full-help

terminal history

Basic Command-Line Interface Commands

---

This chapter describes the commands used to enter and exit the various Cisco IOS configuration command modes. It provides a description of the help command and help features, lists the command editing keys and functions, and details the command history feature.

You can abbreviate the syntax of Cisco IOS configuration commands. The software recognizes a command when you enter enough characters of the command to uniquely identify it.

For user interface task information and examples, see the "Using the Command-Line Interface" chapter of the Cisco IOS Configuration Fundamentals Configuration Guide.

disable

To exit privileged EXEC mode and return to user EXEC mode, or exit to a lower privilege level, enter the disable EXEC command.

disable [level]

Syntax Description

level

(Optional) Specifies the user-privilege level.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Up to 16 security levels can be configured using Cisco IOS. If such levels are configured on a system, using this command with the level option allows a user to exit to a lower security level. If a level is not specified, the user will exit to the user EXEC mode, which is the default.

---

Note There are five commands associated with privilege level 0: disable, enable, exit, help, and logout. If you configure AAA authorization for a privilege level greater than 0, these five commands will not be included in the privilege level command set.

---

Examples

The following example shows use of the disable command to exit from priviliged EXEC mode (indicated by a # after the router prompt) to user EXEC mode (indicated by a > router prompt):

Router# disable

Router>

Related Commands

Command	Description
enable	Enables higher privilege level access, such as privileged EXEC mode.

editing

To disable Cisco IOS enhanced editing features, use the no form of this line configuration command. To reenable these features for a particular line, use the editing form of this command.

editing

no editing

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled

Command Modes

Line configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Enhanced editing features are, by default, enabled on the Cisco IOS. However, there may be situations in which a user may want to disable these features. The no form of this command disables these enhanced editing features, and the plain form of the command can be used to reenable these features.

Table 3 provides a description of the keys used to enter and edit commands when the editing features are enabled. Ctrl indicates the Control key. It must be pressed simultaneously with its associated letter key. Esc indicates the Escape key. It must be pressed first, followed by its associated letter key. Keys are case sensitive.

Table 3 Command Editing Keys and Functions 

Keys	Function
Tab	Completes a partial command name entry. When you enter a unique set of characters and press the Tab key, the system completes the command name. If you enter a set of characters that could indicate more than one command, the system beeps to indicate an error. Enter a question mark (?) immediately following the partial command (no space). The system provides a list of commands that begin with that string.
Delete or Backspace	Erases the character to the left of the cursor.
Return	At the command line, pressing the Return key performs the function of processing a command. At the More prompt on a terminal screen, pressing the Return key scrolls down a line.
Space Bar	Allows you to see more output on the terminal screen. Press the space bar when you see the More prompt on the screen to display the next screen.
Left Arrow1	Moves the cursor one character to the left. When you enter a command that extends beyond a single line, you can press the Left Arrow key repeatedly to scroll back toward the system prompt and verify the beginning of the command entry.
Right Arrow1	Moves the cursor one character to the right.
Up Arrow1 or Ctrl-P	Recalls commands in the history buffer, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Down Arrow1 or Ctrl-N	Return to more recent commands in the history buffer after recalling commands with the Up Arrow or Ctrl-P. Repeat the key sequence to recall successively more recent commands.
Ctrl-A	Moves the cursor to the beginning of the line.
Ctrl-B	Moves the cursor back one character.
Ctrl-D	Deletes the character at the cursor.
Ctrl-E	Moves the cursor to the end of the command line.
Ctrl-F	Moves the cursor forward one character.
Ctrl-K	Deletes all characters from the cursor to the end of the command line.
Ctrl-L and Ctrl-R	Redisplays the system prompt and command line.
Ctrl-T	Transposes the character to the left of the cursor with the character located at the cursor.
Ctrl-U and Ctrl-X	Deletes all characters from the cursor back to the beginning of the command line.
Ctrl-V and Esc Q	Inserts a code to indicate to the system that the keystroke immediately following should be treated as a command entry, not as an editing key.
Ctrl-W	Deletes the word to the left of the cursor.
Ctrl-Y	Recalls the most recent entry in the delete buffer. The delete buffer contains the last ten items you have deleted or cut. Ctrl-Y can be used in conjunction with Esc Y.
Ctrl-Z	Ends configuration mode and returns you to the EXEC prompt.
Esc B	Moves the cursor back one word.
Esc C	Capitalizes the word from the cursor to the end of the word.
Esc D	Deletes from the cursor to the end of the word.
Esc F	Moves the cursor forward one word.
Esc L	Changes the word to lowercase at the cursor to the end of the word.
Esc U	Capitalizes from the cursor to the end of the word.
Esc Y	Recalls the next buffer entry. The buffer contains the last ten items you have deleted. Press Ctrl-Y first to recall the most recent entry. Then press Esc Y up to nine times to recall the remaining entries in the buffer. If you bypass an entry, continue to press Esc Y to cycle back to it.

1 The arrow keys function only with ANSI-compatible terminals.

Examples

The following example displays an enhanced editing mode disabled on line 3:

line 3

 no editing

Related Commands

Command	Description
terminal editing	Enables the enhanced editing mode on the local line.

enable

To enter privileged EXEC mode, or any other security level set by a system administrator, use the enable EXEC command.

enable [level]

Syntax Description

level

(Optional) Privileged level on which to log in.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Entering privileged EXEC mode enables the use of privileged commands. Because many of the privileged commands set operating parameters, privileged access should be password-protected to prevent unauthorized use. If the system administrator has set a password with the enable password global configuration command, you are prompted to enter it before being allowed access to privileged EXEC mode. The password is case sensitive.

If an enable password has not been set, enable mode only can be accessed from the router console.

Security levels can be set by an administrator using the enable password and privilege level commands. Up to 16 privilege levels can be specified, using the numbers 0 through 15. Using these privilege levels, the administrator can allow or deny access to specific commands. Privilege level 0 is traditionally associated with normal EXEC mode, and privilege level 15 is traditionally associated with privileged EXEC mode.

For more information on defined privilege levels, see the "Passwords and Privileges" chapters of the Cisco IOS Security Configuration Guide and the Cisco IOS Security Command Reference publications.

If a level is not specified when entering the enable command, the user will enter the default mode of privileged EXEC (level 15).

---

Note The enable command is associated with privilege level 0. If you configure AAA authorization for a privilege level greater than 0, this command will not be included in the command set for that privilege level.

---

Examples

The following example displays the enable command being entered and a prompt to enter a password. The password is not displayed on the screen. After the user enters the correct password, the system enters privileged command mode, as indicated by the pound sign (#).

Router> enable

Password:

Router#

Related Commands

Command	Description
disable	Exits the user to lower privilege levels, such as returning to user EXEC mode from privileged EXEC mode.
enable password	Sets a local password to control access to various privilege levels.

end

To exit configuration mode, or any of the configuration submodes, use the end global configuration command.

end

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values

Command Modes

Global configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

You can also press Ctrl-Z to exit configuration mode.

Examples

The following example changes the name to george using the hostname global configuration command. Entering the end command causes the system to exit configuration mode and return to privileged EXEC mode.

Router(config)# hostname george

george(config)# end

george#

Related Commands

Command	Description
hostname	Specifies or modify the host name for the network server.

exit

To exit any configuration mode or close an active terminal session and terminate the EXEC, use the exit command at the system prompt.

exit

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values

Command Modes

Available in all command modes.

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the exit command at the EXEC levels to exit the EXEC mode. Use the exit command at the configuration level to return to privileged EXEC mode. Use the exit command in interface, line, router, IPX-router, and route-map command modes to return to global configuration mode. Use the exit command in subinterface configuration mode to return to interface configuration mode. You also can press Ctrl-Z, or use the end command, from any configuration mode to return to privileged EXEC mode.

---

Note The exit command is associated with privilege level 0. If you configure AAA authorization for a privilege level greater than 0, this command will not be included in the command set for that privilege level.

---

Examples

The following example displays an exit from the subinterface configuration mode to return to the interface configuration mode:

Router(config-subif)# exit

Router(config-if)#

The following example displays an exit from the interface configuration mode to return to the global 
configuration mode:

Router(config-if)# exit

Router(config)#

The following example shows how to exit an active session (log-off):

Router> exit

Related Commands

Command	Description
disconnect	Disconnects a line.
end	Exits configuration mode, or any of the configuration submodes.

full-help

To get help for the full set of user-level commands, use the full-help line configuration command.

full-help

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Line configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The full-help command enables (or disables) an unprivileged user to see all of the help messages available. It is used with the show ? command.

Examples

The following example is output for the show ? command with full-help disabled and then enabled:

Router> show ?

  bootflash  Boot Flash information

  calendar   Display the hardware calendar

  clock      Display the system clock

  context    Show context information

  dialer     Dialer parameters and statistics

  history    Display the session command history

  hosts      IP domain-name, lookup style, nameservers, and host table

  isdn       ISDN information

  kerberos   Show Kerberos Values

  modemcap   Show Modem Capabilities database

  ppp        PPP parameters and statistics

  rmon       rmon statistics

  sessions   Information about Telnet connections

  snmp       snmp statistics

  terminal   Display terminal configuration parameters

  users      Display information about terminal lines

  version    System hardware and software status

Router> enable

Password:

Router# configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)# line console 0

Router(config-line)# full-help

Router(config-line)# end

Router#

%SYS-5-CONFIG_I: Configured from console by console

Router# disable

Router> show ?

  access-expression  List access expression

  access-lists       List access lists

  aliases            Display alias commands

  apollo             Apollo network information

  appletalk          AppleTalk information

  arp                ARP table

  async              Information on terminal lines used as router interfaces

  bootflash          Boot Flash information

  bridge             Bridge Forwarding/Filtering Database [verbose]

  bsc                BSC interface information

  bstun              BSTUN interface information

  buffers            Buffer pool statistics

  calendar           Display the hardware calendar

  ...

  translate          Protocol translation information

  ttycap             Terminal capability tables

  users              Display information about terminal lines

  version            System hardware and software status

  vines              VINES information

  vlans              Virtual LANs Information

  whoami             Info on current tty line

  x25                X.25 information

  xns                XNS information

  xremote            XRemote statistics

Related Commands

Command	Description
help	Displays a brief description of the help system.

help

To display a brief description of the help system, enter the help command.

help

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values

Command Modes

Available in all command modes.

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The help command provides a brief description of the context-sensitive help system.

•To list all commands available for a particular command mode, enter a question mark (?) at the system prompt.

•To obtain a list of commands that begin with a particular character string, enter the abbreviated command entry immediately followed by a question mark (?). This form of help is called word help, because it lists only the keywords or arguments that begin with the abbreviation you entered.

•To list a command's associated keywords or arguments, enter a question mark (?) in place of a keyword or argument on the command line. This form of help is called command syntax help, because it lists the keywords or arguments that apply based on the command, keywords, and arguments you have already entered.

---

Note The help command is associated with privilege level 0. If you configure AAA authorization for a privilege level greater than 0, this command will not be included in the command set for that privilege level.

---

Examples

The following example displays the help command giving a brief description of the help system:

Router# help

Help may be requested at any point in a command by entering

a question mark '?'. If nothing matches, the help list will

be empty and you must backup until entering a '?' shows the

available options.

Two styles of help are provided:

1. Full help is available when you are ready to enter a

   command argument (e.g. 'show ?') and describes each possible

   argument.

2. Partial help is provided when an abbreviated argument is entered

   and you want to know what arguments match the input

   (e.g. 'show pr?'.)

The following example shows how to use word help to display all the privileged EXEC commands that begin with the letters "co":

Router# co?

configure  connect  copy

The following example shows how to use command syntax help to display the next argument of a partially complete access-list command. One option is to add a wildcard mask. The <cr> symbol indicates that the other option is to press Return to execute the command.

Router(config)# access-list 99 deny 131.108.134.234 ?

  A.B.C.D  Mask of bits to ignore

<cr>

Related Commands

Command	Description
full-help	Gets help for the full set of user-level commands.

history

To enable the command history function, use the history line configuration command. To disable the command history feature, use the no form of this command.

history

no history

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled, 10 command lines in buffer

Command Modes

Line configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The command history feature provides a record of EXEC commands that you have entered. This feature is particularly useful for recalling long or complex commands or entries, including access lists.

To chage the number of command lines that the system will record in its history buffer, use the history size command.

The history command enables the history function with the last buffer size specified or, if there was not a prior setting, with the default of 10 lines. The no history command disables the history feature.

The show history command will list the commands you have entered, but you can also use your keyboard to display individual commands. Table 4 lists the keys you can use to recall commands from the command history buffer.

Table 4 History Keys

Key	Functions
Ctrl-P or Up Arrow1	Recalls commands in the history buffer in a backward sequence, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Ctrl-N or Down Arrow1	Returns to more recent commands in the history buffer after recalling commands with Ctrl-P or the Up Arrow. Repeat the key sequence to recall successively more recent commands.

1 The arrow keys function only with ANSI-compatible terminals such as VT100s.

Examples

The following example displays line 4 configured with a history buffer size of 35 lines:

line 4

 history size 35

Related Commands

Command	Description
history size	Sets the command history buffer size for a particular line.
show history	Lists the commands you have entered in the current EXEC session.
terminal history	Enables the command history feature for the current terminal session or changes the size of the command history buffer for the current terminal session.

history size

To change the command history buffer size for a particular line, use the history size line configuration command. To reset the command histroy buffer size to ten lines, use the no form of this command.

history size number-of-lines

no history size

Syntax Description

number-of-lines

Specifies the number of command lines that the system will record in its history buffer. The range is 0 to 256. The default is 10.

Defaults

Ten command lines

Command Modes

Line configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The history size command should be used in conjunction with the history and show history commands. The history command enables or disables the command history function. The show history command lists the commands you have entered in the current EXEC session. The number of commands that the history buffer will show is set by the history size command.

---

Note The history size command only sets the size of the buffer; it does not reenable the history feature. If the no history command is used, the history command must be used to reenable this feature.

---

Examples

The following example displays line 4 configured with a history buffer size of 35 lines:

line 4

 history size 35

Related Commands

Command	Description
history	Enables or disables the command history function.
show history	Lists the commands you have entered in the current EXEC session.
terminal history size	Enables the command history function for the current terminal session or changes the size of the command history buffer for the current terminal session.

logout

To close an active terminal session by logging off the router, use the logout command in user EXEC mode.

logout

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

User EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

In the following example, the exit (global) command is used to move from global configuration mode to privileged EXEC mode, the disable command is used to move from privileged EXEC mode to user EXEC mode, and the logout command is used to log off (exit from the active session):

Router(config)# exit

Router# disable

Router> logout 

Related Commands

Command	Description
exit (global)	Exits any configuration mode to the next highest mode in the CLI mode hierarchy.

menu (EXEC)

To display a preconfigured user menu, use the menu EXEC command.

menu name

Syntax Description

name	The name of the menu.

Command Modes

User EXEC or privileged EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

A user menu is a type of user interface where text descriptions of actions to be performed are displayed to the user, which the user can use to select services and functions without having to know the details of command-line interface (CLI) commands.

Menus can be created for users in global configuration mode, using the commands listed in the Related Commands table below. The description of these commands can be found in the "Connection, Menu, and System Banner Commands" chapter of this document.

A menu can be invoked at either the user or privileged EXEC level, but if an item in the menu contains a privileged EXEC command, the user must be logged in at the privileged level for the command to succeed.

Examples

The following example invokes a menu named OnRamp:

Router> menu OnRamp

      Welcome to OnRamp Internet Services

       Type a number to select an option;

            Type 9 to exit the menu.

1     Read email

2     UNIX Internet access

3     Resume UNIX connection

6     Resume next connection

9     Exit menu system

Related Commands

Command	Description
menu command	Specifies underlying commands for user interface menus.
menu clear-screen	Clears the terminal screen before displaying a menu.
menu default	Specifies the menu item to use as the default.
menu-exit	Specifics an exit option in a user menu. See the menu command command for details.
menu line-mode	Requires the user to press Enter after specifying an option number.
menu options	Sets options for items in user interface menus.
menu prompt	Specifies the prompt for a user interface menu.
menu single-space	Displays menu items single-spaced rather than double-spaced.
menu status-line	Displays a line of status information about the current user at the top of a menu
menu text	Specifies the text of a menu item in a user interface menu.
menu title	Creates a title, or banner, for a user menu.
no menu	Deletes a specified menu from a menu configuration.

more begin

To search the output of any more command, use the more begin command in EXEC mode. This command begins unfiltered output of the more command with the first line that contains the regular expression you specify.

more any-command | begin regular-expression

To search the remaining output of the more command, use the following command at the --More-- prompt:

/regular-expression

To filter the remaining output of the more command, use one of the following commands at the --More-- prompt:

-regular-expression

+regular-expression

Syntax Description

any-command	Any supported more command.
|	A vertical bar (the "pipe" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in more command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.
-	Specifies a filter at a --More-- prompt that only displays output lines that do not contain the regular expression.
+	Specifies a filter at a --More-- prompt that only displays output lines that contain the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the more command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note You can only specify one filter for each more command. The filter remains until the more command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

Examples

The following is partial sample output of the more nvram:startup-config | begin command that begins unfiltered output with the first line that contain the regular expression "ip." At the --More-- prompt, the user specifies a filter to exclude output lines that contain the regular expression "ip."

router# more nvram:startup-config | begin ip

ip subnet-zero

ip domain-name cisco.com

ip name-server 198.92.30.32

ip name-server 171.69.2.132

!

isdn switch-type primary-5ess

.

.

.

interface Ethernet1

 ip address 5.5.5.99 255.255.255.0

 --More-- 

-ip

filtering...

 media-type 10BaseT

!

interface Serial0:23

 encapsulation frame-relay

 no keepalive

 dialer string 4001

 dialer-group 1

 isdn switch-type primary-5ess

 no fair-queue

Related Commands

Command	Description
more exclude	Filters more command output so that it excludes lines that contain a particular regular expression.
more include	Filters more command output so that it only displays lines that contain a particular regular expression.
show begin	Searches the output of any show command.
show exclude	Filters show command output so that it excludes lines that contain a particular regular expression.
show include	Filters show command output so that it only displays lines that contain a particular regular expression.

more exclude

To filter more command output so that it excludes lines that contain a particular regular expression, use the more exclude command in EXEC mode.

more any-command | exclude regular-expression

To search the remaining output of the more command, use the following command at the --More-- prompt:

/regular-expression

Syntax Description

any-command	Any supported more command.
|	A vertical bar (the "pipe" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in more command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the more command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note Once you specify a filter for a more command, you cannot specify another filter at a --More-- prompt. The filter remains until the more command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

Examples

The following is partial sample output of the more nvram:startup-config | exclude command. It excludes lines that contain the regular expression "service." At the --More-- prompt, the user searches for the regular expression "Dialer1." This continues filtered output with the first line that contains "Dialer1."

router# more nvram:startup-config | exclude service

!

version 12.0

!

hostname router

!

boot system flash

no logging buffered

!

ip subnet-zero

ip domain-name cisco.com

.

.

.

--More--

/Dialer1

filtering...

interface Dialer1

 no ip address

 no ip directed-broadcast

 dialer in-band

 no cdp enable

Related Commands

Command	Description
more begin	Begins unfiltered output of the more command with the first line that contains the regular expression you specify.
more include	Filters more command output so that it only displays lines that contain a particular regular expression.
show begin	Searches the output of any show command.
show exclude	Filters show command output so that it excludes lines that contain a particular regular expression.
show include	Filters show command output so that it only displays lines that contain a particular regular expression.

more include

To filter more command output so that it only displays lines that contain a particular regular expression, use the more include command in EXEC mode.

more any-command | include regular-expression

To search the remaining output of the more command, use the following command at the --More-- prompt:

/regular-expression

Syntax Description

any-command	Any supported more command.
|	A vertical bar (the "|" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in more command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the more command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note Once you specify a filter for a more command, you cannot specify another filter at a --More-- prompt. The filter remains until the more command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

Examples

The following is partial sample output of the more nvram:startup-config | include command. It only displays lines that contain the regular expression "ip."

router# more nvram:startup-config | include ip

ip subnet-zero

ip domain-name cisco.com

ip name-server 198.92.30.32

ip name-server 171.69.2.132

 description ip address 172.21.53.199 255.255.255.0

 ip address 172.21.53.199 255.255.255.0

Related Commands

Command	Description
more begin	Begins unfiltered output of the more command with the first line that contains the regular expression you specify.
more exclude	Filters more command output so that it excludes lines that contain a particular regular expression.
show begin	Searches the output of any show command.
show exclude	Filters show command output so that it excludes lines that contain a particular regular expression.
show include	Filters show command output so that it only displays lines that contain a particular regular expression.

show begin

To search the output of any show command, use the show begin command in EXEC mode.

show any-command | begin regular-expression

To search the remaining output of the show command, use the following command at the --More-- prompt:

/regular-expression

To filter the remaining output of the show command, use one of the following commands at the --More-- prompt:

-regular-expression

+regular-expression

Syntax Description

any-command	Any supported show command.
|	A vertical bar (the "pipe" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in show command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.
-	Specifies a filter at a --More-- prompt that only displays output lines that do not contain the regular expression.
+	Specifies a filter at a --More-- prompt that only displays output lines that contain the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the show command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note You can only specify one filter for each show command. The filter remains until the show command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

---

Note A few show commands that have long output requirements use no responses at the --More-- prompt to jump to the next table of output; these outputs require you to enter the same number of Ctrl-^ combinations as you would no responses to completely abort output.

---

Examples

The following is partial sample output of the show interface | begin command that begins unfiltered output with the first line that contains the regular expression "Ethernet." At the --More-- prompt, the user specifies a filter to include only the lines that contain the regular expression "Serial."

router# show interface | begin Ethernet

Ethernet0 is up, line protocol is up

Hardware is Lance, address is 0060.837c.6399 (bia 0060.837c.6399)

  Description: ip address is 172.1.2.14 255.255.255.0

  Internet address is 172.1.2.14/24

.

.

.

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

--More--

+Serial

filtering...

Serial1 is up, line protocol is up

Serial2 is up, line protocol is up

Serial3 is up, line protocol is down

Serial4 is down, line protocol is down

Serial5 is up, line protocol is up

Serial6 is up, line protocol is up

Serial7 is up, line protocol is up

Related Commands

Command	Description
more begin	Begins unfiltered output of the more command with the first line that contains the regular expression you specify.
more exclude	Filters more command output so that it excludes lines that contain a particular regular expression.
more include	Filters more command output so that it only displays lines that contain a particular regular expression.
show exclude	Filters show command output so that it excludes lines that contain a particular regular expression.
show include	Filters show command output so that it only displays lines that contain a particular regular expression.

show exclude

To filter show command output so that it excludes lines that contain a particular regular expression, use the show exclude command in EXEC mode.

show any-command | exclude regular-expression

To search the remaining output of the show command, use the following command at a --More-- prompt:

/regular-expression

Syntax Description

any-command	Any supported show command.
|	A vertical bar (the "|" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in show command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the show command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note Once you specify a filter for a show command, you cannot specify another filter at a --More-- prompt. The filter remains until the show command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

---

Note A few show commands that have long output requirements use no responses at the --More-- prompt to jump to the next table of output; these outputs require you to enter the same number of Ctrl-^ combinations as you would no responses to completely abort output.

---

Examples

The following is partial sample output of the show | exclude command used with the show buffers command. It excludes lines that contain the regular expression "0 misses." At the --More-- prompt, the user searches for the regular expression "Serial0." This continues the filtered output with the first line that contains "Serial0."

router# show buffers | exclude 0 misses

Buffer elements:

     398 in free list (500 max allowed)

Public buffer pools:

Small buffers, 104 bytes (total 50, permanent 50):

     50 in free list (20 min, 150 max allowed)

     551 hits, 3 misses, 0 trims, 0 created

Big buffers, 1524 bytes (total 50, permanent 50):

     49 in free list (5 min, 150 max allowed)

Very Big buffers, 4520 bytes (total 10, permanent 10):

.

.

.

Huge buffers, 18024 bytes (total 0 permanent 0):

     0 in free list (0 min, 4 max allowed)

--More--

/Serial0

filtering...

Serial0 buffers, 1543 bytes (total 64, permanent 64):

     16 in free list (0 min, 64 max allowed)

     48 hits, 0 fallbacks

Related Commands

Command	Description
more begin	Begins unfiltered output of the more command with the first line that contains the regular expression you specify.
more exclude	Filters more command output so that it excludes lines that contain a particular regular expression.
more include	Filters more command output so that it only displays lines that contain a particular regular expression.
show begin	Searches the output of any show command.
show include	Filters show command output so that it only displays lines that contain a particular regular expression.

show history

To list the commands you have entered in the current EXEC session, use the show history EXEC command.

show history

Syntax Description

This command has no arguments or keywords.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The command history feature provides a record of EXEC commands you have entered. The number of commands that the history buffer will record is determined by the history size line configuration command or the terminal history size EXEC command.

Table 5 lists the keys and functions you can use to recall commands from the command history buffer.

 

Table 5 History Keys

Key	Function
Ctrl-P or Up Arrow	Recalls commands in the history buffer in a backward sequence, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Ctrl-N or Down Arrow	Returns to more recent commands in the history buffer after recalling commands with Ctrl-P or the Up Arrow. Repeat the key sequence to recall successively more recent commands.

 

Examples

The following is sample output from the show history command, which lists the commands the user has entered in EXEC mode for this session:

Router# show history

  help

  where

  show hosts

  show history

Router# 

Related Commands

Command	Description
history size	Enables the command history function, or changes the command history buffer size for a particular line.
terminal history size	Enables the command history feature for the current terminal session or change the size of the command history buffer for the current terminal session.

show include

To filter show command output so that it only displays lines that contain a particular regular expression, use the show include command in EXEC mode.

show any-command | include regular-expression

To search the remaining output of the show command, use the following command at the --More-- prompt:

/regular-expression

Syntax Description

any-command	Any supported show command.
|	A vertical bar (the "|" symbol) indicates that an output processing specification follows.
regular-expression	Any regular expression found in show command output.
/	Specifies a search at a --More-- prompt that begins unfiltered output with the first line that contains the regular expression.

Command Modes

EXEC

Command History

Release	Modification
12.0(1)T	This modification of the show command was introduced.

Usage Guidelines

The regular-expression argument is case sensitive and allows for complex matching requirements.

You can specify a new search at every --More-- prompt.

---

Note Once you specify a filter for a show command, you cannot specify another filter at a --More-- prompt. The filter remains until the show command output finishes or until you interrupt the output (using Ctrl-^).

---

Because prior output is not saved, you cannot search or filter backward through prior output.

When output volume is large, the search can produce long lists of output. To interrupt this output, press Ctrl-^.

---

Note A few show commands that have long output requirements use no responses at the --More-- prompt to jump to the next table of output; these outputs require you to enter the same number of Ctrl-^ combinations as you would no responses to completely abort output.

---

Examples

The following is partial sample output of the show interface | include command. It only displays lines that contain the regular expression "( is )." The parentheses force the inclusion of the spaces before and after "is." This ensures that only lines containing "is" with a space both before and after it will be included in the output. This excludes lines with words like "disconnect."

router# show interface | include ( is )

ATM0 is administratively down, line protocol is down

  Hardware is ATMizer BX-50

Dialer1 is up (spoofing), line protocol is up (spoofing)

  Hardware is Unknown

  DTR is pulsed for 1 seconds on reset

Ethernet0 is up, line protocol is up

  Hardware is Lance, address is 0060.837c.6399 (bia 0060.837c.6399)

  Internet address is 172.21.53.199/24

Ethernet1 is up, line protocol is up

  Hardware is Lance, address is 0060.837c.639c (bia 0060.837c.639c)

  Internet address is 5.5.5.99/24

Serial0:0 is down, line protocol is down

  Hardware is DSX1

.

.

.

 --More-- 

At the --More-- prompt, the user searches for the regular expression "Serial0:13." This continues filtered output with the first line that contains "Serial0:13."

/Serial0:13

filtering...

Serial0:13 is down, line protocol is down

  Hardware is DSX1

  Internet address is 11.0.0.2/8

     0 output errors, 0 collisions, 2 interface resets

  Timeslot(s) Used:14, Transmitter delay is 0 flags

Related Commands

Command	Description
more begin	Begins unfiltered output of the more command with the first line that contains the regular expression you specify.
more exclude	Filters more command output so that it excludes lines that contain a particular regular expression.
more include	Filters more command output so that it only displays lines that contain a particular regular expression.
show begin	Searches the output of any show command.
show exclude	Filters show command output so that it excludes lines that contain a particular regular expression.

terminal editing

To enable the enhanced editing mode on the local line, use the terminal editing EXEC command. To disable the enhanced editing mode on the current line, use the no form of this command.

terminal editing

terminal no editing

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Table 6 provides a description of the keys used to enter and edit commands. Ctrl indicates the Control key. It must be pressed simultaneously with its associated letter key. Esc indicates the Escape key. It must be pressed first, followed by its associated letter key. Keys are not case sensitive.

Table 6 Command Editing Keys and Functions 

Keys	Function
Tab	Completes a partial command name entry. When you enter a unique set of characters and press the Tab key, the system completes the command name. If you enter a set of characters that could indicate more than one command, the system beeps to indicate an error. Enter a question mark (?) immediately following the partial command (no space). The system provides a list of commands that begin with that string.
Delete or Backspace	Erases the character to the left of the cursor.
Return	At the command line, pressing the Return key performs the function of processing, or carrying out, a command. At the More prompt on a terminal screen, pressing the Return key scrolls down a line.
Space Bar	Scrolls down a page on the terminal screen. Press the space bar when you see the More prompt on the screen to display the next screen.
Left arrow1	Moves the cursor one character to the left. When you enter a command that extends beyond a single line, you can continue to press the left arrow key at any time to scroll back toward the system prompt and verify the beginning of the command entry.
Right arrow1	Moves the cursor one character to the right.
Up arrow1 or Ctrl-P	Recalls commands in the history buffer, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Down arrow1 or Ctrl-N	Return to more recent commands in the history buffer after recalling commands with the Up arrow or Ctrl-P. Repeat the key sequence to recall successively more recent commands.
Ctrl-A	Moves the cursor to the beginning of the line.
Ctrl-B	Moves the cursor back one character.
Ctrl-D	Deletes the character at the cursor.
Ctrl-E	Moves the cursor to the end of the command line.
Ctrl-F	Moves the cursor forward one character.
Ctrl-K	Deletes all characters from the cursor to the end of the command line.
Ctrl-L and Ctrl-R	Redisplays the system prompt and command line.
Ctrl-T	Transposes the character to the left of the cursor with the character located at the cursor.
Ctrl-U and Ctrl-X	Deletes all characters from the cursor back to the beginning of the command line.
Ctrl-V and Esc Q	Inserts a code to indicate to the system that the key stroke immediately following should be treated as a command entry, not as an editing key.
Ctrl-W	Deletes the word to the left of the cursor.
Ctrl-Y	Recalls the most recent entry in the delete buffer. The delete buffer contains the last ten items you have deleted or cut. Ctrl-Y can be used in conjunction with Esc Y.
Ctrl-Z	Ends configuration mode and returns you to the EXEC prompt.
Esc B	Moves the cursor back one word.
Esc C	Capitalizes the word at the cursor.
Esc D	Deletes from the cursor to the end of the word.
Esc F	Moves the cursor forward one word.
Esc L	Changes the word at the cursor to lowercase.
Esc U	Capitalizes from the cursor to the end of the word.
Esc Y	Recalls the next buffer entry. The buffer contains the last ten items you have deleted. Press Ctrl-Y first to recall the most recent entry. Then press Esc Y up to nine times to recall the remaining entries in the buffer. If you bypass an entry, continue to press Esc Y to cycle back to it.

1 The arrow keys function only with ANSI-compatible terminals.

Examples

The following example displays enhanced mode editing reenabled for the current terminal session:

terminal editing

Related Commands

Command	Description
editing	Reenables enhanced editing mode for a particular line.

terminal full-help

To get help for the full set of user-level commands, use the terminal full-help EXEC command.

terminal full-help

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The terminal full-help command enables (or disables) a user to see all of the help messages available from the terminal. It is used with the show ? command.

Examples

The following example displays output for the show ? command with terminal full-help disabled and then enabled:

Router> show ?

  bootflash  Boot Flash information

  calendar   Display the hardware calendar

  clock      Display the system clock

  context    Show context information

  dialer     Dialer parameters and statistics

  history    Display the session command history

  hosts      IP domain-name, lookup style, nameservers, and host table

  isdn       ISDN information

  kerberos   Show Kerberos Values

  modemcap   Show Modem Capabilities database

  ppp        PPP parameters and statistics

  rmon       rmon statistics

  sessions   Information about Telnet connections

  snmp       snmp statistics

  terminal   Display terminal configuration parameters

  users      Display information about terminal lines

  version    System hardware and software status

Router> terminal full-help

Router> show ?

  access-expression  List access expression

  access-lists       List access lists

  aliases            Display alias commands

  apollo             Apollo network information

  appletalk          AppleTalk information

  arp                ARP table

  async              Information on terminal lines used as router interfaces

  bootflash          Boot Flash information

  bridge             Bridge Forwarding/Filtering Database [verbose]

  bsc                BSC interface information

  bstun              BSTUN interface information

  buffers            Buffer pool statistics

  calendar           Display the hardware calendar

  cdp                CDP information

  clns               CLNS network information

  clock              Display the system clock

  cls                DLC user information

  cmns               Connection-Mode networking services (CMNS) information

  compress           Show compression statistics.

  ...

  x25                X.25 information

  xns                XNS information

  xremote            XRemote statistics

Related Commands

Command	Description
full-help	Gets help for the full set of user-level commands.
help	Displays a brief description of the help system.

terminal history

To enable the command history feature for the current terminal session or change the size of the command history buffer for the current terminal session, use the terminal history EXEC command. To disable the command history feature or reset the command history buffer to its default size, use the no form of this command.

terminal history [size number-of-lines]

terminal no history [size]

Syntax Description

size	(Optional) Sets command history buffer size.
number-of-lines	(Optional) Specifies the number of command lines that the system will record in its history buffer. The range is 0 to 256. The default is 10.

Defaults

10 lines

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

The terminal history command without the size keyword and argument enables the command history feature with the last buffer size specified or the default size. The terminal no history command without the size keyword disables the command history feature. The terminal no history size command resets the buffer size to the default of 10 command lines.

The terminal history command provides a record of EXEC commands you have entered. This feature is particularly useful to recall long or complex commands or entries, including access lists.

Table 7 lists the keys and functions you can use to recall commands from the history buffer.

Table 7 History Keys

Key	Function
Ctrl-P or Up Arrow1	Recalls commands in the history buffer in a backward sequence, beginning with the most recent command. Repeat the key sequence to recall successively older commands.
Ctrl-N or Down Arrow1	Returns to more recent commands in the history buffer after recalling commands with Ctrl-P or the Up Arrow. Repeat the key sequence to recall successively more recent commands.

1 The arrow keys function only with ANSI-compatible terminals such as VT100s.

Examples

The following example displays the number of command lines recorded is set to 15 for the local line:

terminal history size 15

Related Commands

Command	Description
history	Enables the command history function, or changes the command history buffer size for a particular line.
show history	Lists the commands you have entered in the current EXEC session.