|
|
To display a brief description of the help system, enter the help command.
helpThis command has no arguments or keywords.
All
The help command provides a brief description of the context-sensitive help system.
Enter the help command for a brief description of the help system.
Switch# 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 `?' show 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 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.
Switch(config)# access-list 99 deny 131.108.134.234 ? A.B.C.D Mask of bits to ignore <cr>
To enable the command history function or to change the command history buffer size for a particular line, use the history line configuration command. To disable the command history feature, use the no form of this command.
history [size number-of-lines]
number-of-lines | Specifies the number of command lines that the system records in its history buffer. The range is 0 to 256. |
10 lines
Line configuration
The history command without the size keyword and the number-of-lines argument enables the history function with the last buffer size specified or with the default of 10 lines if there was not a prior setting.
The no history command without the size keyword and the number-of lines argument disables the history feature but remembers the buffer size if it was something other than the default. The no history size command resets the buffer size to 10.
The command history feature provides a record of EXEC commands you have entered. This feature is particularly useful for recalling long or complex commands or entries, including access lists.
Table 8-1 lists the keys and functions you can use to recall commands from the command history buffer.
| 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. |
| 1The arrow keys function only with ANSI-compatible terminals such as VT100s. |
In the following example, line 4 is configured with a history buffer size of 35 lines.
Switch(config)# line 4 Switch(config-line)# history size 35
show history
terminal history size
To specify or modify the host name for the switch, use the hostname global configuration command. The host name is used in prompts and default configuration filenames.
hostname name
name | New host name for the switch; the name is case sensitive. |
The factory-assigned default host name is switch.
Global configuration
The order of display at startup is:
1. Banner MOTD
2. Login
3. Password prompts
4. EXEC banner
The following example changes the host name to ls1010.
Switch# hostname ls1010 ls1010#
Posted: Tue Jun 22 13:34:58 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.