H3C S5120-SI Series

1-18
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.
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.
Table
1-4 lists these functions.
Table 1-4 Edit functions
Key Function
Common keys
If the editing buffer is not full, insert the character at the position
of the cursor and move the cursor to the right.
Backspace
Deletes the character to the left of the cursor and move the
cursor back one character.
Left-arrow key or Ctrl+B The cursor moves one character space to the left.
Right-arrow key or Ctrl+F The cursor moves one character space to the right.
Up-arrow key or Ctrl+P
Down-arrow key or Ctrl+N
Displays history commands
Tab
Pressing Tab after entering part of a keyword enables the fuzzy
help function.
z If finding a unique match, the system substitutes the
complete keyword for the incomplete one and displays it in
the next line.
z When there are several matches, if you repeatedly press
Tab, all the keywords starting with the letter that you enter
are displayed in cycles.
z If there is no match at all, the system does not modify the
incomplete keyword and displays it again in the next line.