3Com 10014298 manual Common Command Line Error Messages, Retrieve History Command

32CHAPTER 1: SYSTEM ACCESS

-v Verbose output. ICMP packets other than ECHO_RESPONSE that are received are listed

STRING<1-20> IP address or hostname of a remote system

Ip IP Protocol

■Enter a command with a ?, separated by a space. If this position is for parameters, all the parameters and their brief descriptions will be listed.

[Quidway] interface vlan ?

<1-4094> VLAN interface number

[Quidway] interface vlan 1 ?

<cr>

<cr> indicates no parameter in this position. The next command line repeats the command, you can press Enter to execute it directly.

■Enter a character string with a ?, and list all the commands beginning with this character string.

<SW7750>pi?

ping

■Input a command with a character string and ?, and list all the key words beginning with this character string in the command.

<SW7750>display ver?

version

Common Command Line Error Messages

All the commands that are entered by users can be correctly executed if they have passed the grammar check. Otherwise, error messages are reported to users. Common error messages are listed in Table 21.

Table 21 Common Command Line Error Messages

Error messages	Causes
Unrecognized command	Cannot find the command.
	Cannot find the keyword.
	Wrong parameter type.
	The value of the parameter exceeds the range.
Incomplete command	The command is incomplete.
Too many parameters	You entered too many parameters.
Ambiguous command	The parameters you entered are not specific.

History Command

The command line interface provides a function similar to DosKey. The commands entered by users can be automatically saved by the command line interface and you can invoke and execute them at any time. By default, the history command buffer can store 10 history commands for each user. The operations are shown in Table 22.

Table 22 Retrieve History Command

Operation	Key	Result
Display history command	display	Displays history commands by
	history-command	the user who is entering
		them.
Retrieve the previous history	Up cursor key <> or <Ctrl+P>	Retrieves the previous history
command		command, if there is any.