Synchronous Information Output; Undo Form Of A Command; Editing Features - 3Com 4210G Series Configuration Manual

5) Enter a command followed by a character string and a ?. All the keywords starting with this string
are listed.
<Sysname> display ver?
version
6) Press Tab after entering the first several letters of a keyword to display the complete keyword,
provided these letters can uniquely identify the keyword in this command. If several matches are
found, the complete keyword which is matched first is displayed (the matching rule is: the letters
next to the input letters are arranged in alphabetic order, and the letter in the first place is matched
first.). If you repeatedly press Tab, all the keywords starting with the letter that you enter are
displayed in cycles.

Synchronous Information Output

Synchronous information output refers to the feature that if the user's input is interrupted by system
output, then after the completion of system output the system will display a command line prompt and
your input so far, and you can continue your operations from where you were stopped.
You can use the info-center synchronous command to enable synchronous information output. For
the detailed description of this function, refer to Information Center Configuration in the System
Volume.

Undo Form of a Command

Adding the keyword undo can form an undo command. Almost every configuration command has an
undo form. undo commands are generally used to restore the system default, disable a function or
cancel a configuration. For example, the info-center enable command is used to enable the
information center, while the undo info-center enable command is used to disable the information
center. (By default, the information center is enabled.)

Editing Features

The CLI provides the basic command editing functions and supports multi-line editing. When you
execute a command, the system automatically goes to the next line if the maximum length of the
command is reached. You cannot press Enter to go to the next line; otherwise, the system will
automatically execute the command. The maximum length of each command is 510 characters.
9-4 lists these functions.
Table 9-4 Edit functions
Common keys
Backspace
Left-arrow key or Ctrl+B
Right-arrow key or Ctrl+F
Up-arrow key or Ctrl+P
Down-arrow key or Ctrl+N
Key
If the editing buffer is not full, insert the character at the position
of the cursor and move the cursor to the right.
Deletes the character to the left of the cursor and move the
cursor back one character.
The cursor moves one character space to the left.
The cursor moves one character space to the right.
Displays history commands
Function
9-17
Table