Cisco Networking: Command Help
When you are connected to a Cisco network device with an open console connection, help is available. You are staring at this friendly command prompt, or something similar:
So now what? Well, you can ask the IOS for help. Type a question mark after Router>, and the IOS displays a list of commands that are possible at that level.
Router>? EXEC commands: access-enable Create a temporary Access-List entry access-profile Apply user-profile to interface clear Reset functions connect Open a terminal connection crypto Crypto disable Turn off privileged commands disconnect Disconnect an existing network connection enable Turn on privileged commands exit Exit from the EXEC help Description of the interactive help system lock Lock the terminal login Log in as a particular user logout Exit from the EXEC modemui Start a modem-like user interface mrinfo Request neighbor and version information from a multicast router mstat Show statistics after multiple multicast traceroutes mtrace Trace reverse multicast path from destination to source name-connection Name an existing network connection pad Open a X.29 PAD connection ping Send echo messages --More-
When the --More- text is displayed at the bottom of a page (see the preceding code), you can press Enter to advance the list by one line or press the spacebar to advance by one screen. If you prefer to start typing one of the commands, you can hit just about any key to exit from the --More- listing and type your command.
Other times you may start typing the letters of a command but you cannot remember what the actual command is. Anytime you type the command, you can add a question mark to the end of it to see what commands could be completed. Here is an example in Privileged EXEC mode:
Router#c? call ccm-manager cd clear clock cns configure connect copy crypt