Operation Manual – System Maintaining and DebuggingH3C S5500-EI Series Ethernet Switches Chapter 1 Basic Configurations1-134) Enter a character string followed by a >. All the commands starting with thisstring are displayed. c?cdclockcopy5) Enter a command followed by a character string and a >. All the keywordsstarting with this string are listed. display ver?version6) Press after entering the first several letters of a keyword to display thecomplete keyword, provided these letters can uniquely identify the keyword in thiscommand.1.2.3 Synchronous Information OutputSynchronous information output refers to the feature that if the user’s input isinterrupted by system output, then after the completion of system output the system willdisplay a command line prompt and your input so far, and you can continue youroperations from where you were stopped.You can use the info-center synchronous command to enable synchronousinformation output. For the detailed description of this function, refer to InformationCenter Configuration.1.2.4 undo Form of a CommandAdding the keyword undo can form an undo command. Almost every configurationcommand has the undo form. undo commands are generally used to restore thesystem default, disable a function or cancel a configuration. For example, theinfo-center enable command is used to enable the information center, while the undoinfo-center enable command is used to disable the information center. (By default, theinformation center is enabled.)1.2.5 Edit FeaturesThe CLI provides the basic command edit functions and supports multi-line editing. Themaximum length of each command is 256 characters. Table 1-4 lists these functions.