Enter ? at any prompt to see a complete listing of available commands that can be used at the prompt level. You can also do partial a word to see available commands that start with letters before ? (e.g. s?, cl?, eth?).
When entering commands, you don't have to complete the entire word just enough to make it recognizable to the IOS from any other command. Example: instead of using the show command, you can use sh in place of show and it will work the same.
The ? can also be used to show the next step in the command. If you type a partial command and press the [Tab] key, the command is completed for you automatically. Router_2(config)# int [Tab] Router_2(config)# interface Router_2(config)# interface ? Async Async interface BVI Bridge-Group Virtual Interface Dialer Dialer interface Ethernet IEEE 802.3 Group-Async Async Group interface Lex Lex interface Loopback Loopback interface Null Null interface Port-channel Ethernet Channel of interfaces Serial Serial Tunnel Tunnel interface Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing Router_2(config)# interface ethernet ? <0-0> Ethernet interface number Router_2(config)# interface ethernet 0 Router_2(config-if)#
Use the [spacebar] to scroll another page if available commands is longer than one page, use the [enter] key to scroll one line at a time. If help page is scrolled, press any key to return to the command line.
Command Line Editing Commands
Command
Meaning
Ctrl+A
Moves cursor to beginning of the line.
Ctrl+E
Moves cursor to end of line.
Ctrl+B
Moves back one character.
Esc+B
Moves back one word.
Ctrl+F
Moves forward one character.
Esc+F
Moves forward one word.
Ctrl+D
Deletes a single character at the cursor.
Backspace
Deletes a single character.
Ctrl+R
Redisplays the command prompt and command line.
Ctrl+U
Erases a line.
Ctrl+W
Erases a word.
Ctrl+Z
Ends Configuration mode and returns to EXEC.
tab
Finishes typing a command for you.
Router Command History
Command
Meaning
Ctrl+P or Up arrow
Shows last command entered.
Ctlr+N or Down arrow
Shows previous commands entered.
show history
Shows last 10 commands entered by default.
show terminal
Shows terminal configurations and history buffer size.
terminal history size [0-256]
Changes buffer size (max 256).
To see how long a router has been up, how it was restarted, the IOS version, number of Interfaces, memory, and config-register setting use the command show version from privileged EXEC mode
When entering commands, you don't have to complete the entire word just enough to make it recognizable to the IOS from any other command. Example: instead of using the show command, you can use sh in place of show and it will work the same.
The ? can also be used to show the next step in the command. If you type a partial command and press the [Tab] key, the command is completed for you automatically. Router_2(config)# int [Tab] Router_2(config)# interface Router_2(config)# interface ? Async Async interface BVI Bridge-Group Virtual Interface Dialer Dialer interface Ethernet IEEE 802.3 Group-Async Async Group interface Lex Lex interface Loopback Loopback interface Null Null interface Port-channel Ethernet Channel of interfaces Serial Serial Tunnel Tunnel interface Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing Router_2(config)# interface ethernet ? <0-0> Ethernet interface number Router_2(config)# interface ethernet 0 Router_2(config-if)#
Use the [spacebar] to scroll another page if available commands is longer than one page, use the [enter] key to scroll one line at a time. If help page is scrolled, press any key to return to the command line.
Command Line Editing Commands
Command
Meaning
Ctrl+A
Moves cursor to beginning of the line.
Ctrl+E
Moves cursor to end of line.
Ctrl+B
Moves back one character.
Esc+B
Moves back one word.
Ctrl+F
Moves forward one character.
Esc+F
Moves forward one word.
Ctrl+D
Deletes a single character at the cursor.
Backspace
Deletes a single character.
Ctrl+R
Redisplays the command prompt and command line.
Ctrl+U
Erases a line.
Ctrl+W
Erases a word.
Ctrl+Z
Ends Configuration mode and returns to EXEC.
tab
Finishes typing a command for you.
Router Command History
Command
Meaning
Ctrl+P or Up arrow
Shows last command entered.
Ctlr+N or Down arrow
Shows previous commands entered.
show history
Shows last 10 commands entered by default.
show terminal
Shows terminal configurations and history buffer size.
terminal history size [0-256]
Changes buffer size (max 256).
To see how long a router has been up, how it was restarted, the IOS version, number of Interfaces, memory, and config-register setting use the command show version from privileged EXEC mode
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