9-15During daily maintenance or when the system is operating abnormally, you need to view eachmodule’s running status to find the problem. Therefore, you are required to execute the correspondingdisplay commands one by one. To collect more information one time, you can execute the displaydiagnostic-information command in any view to display or save statistics of each module’s runningstatus. The execution of the display diagnostic-information command has the same effect as that ofthe commands display clock, display version, display device, and display current-configuration.z For the detailed description of the display users command, refer to Login Commands in theSystem Volume.z Support for the display configure-user and display current-configuration command depends on thedevice model.z The display commands discussed above are for the global configuration. Refer to thecorresponding section for the display command for specific protocol and interface.CLI FeaturesThis section covers the following topics:z Introduction to CLIz Online Help with Command Linesz Synchronous Information Outputz Undo Form of a Commandz Editing Featuresz CLI Displayz Saving History Commandz Command Line Error InformationIntroduction to CLICLI is an interaction interface between devices and users. Through CLI, you can configure yourdevices by entering commands and view the output information and verify your configurations, thusfacilitating your configuration and management of your devices.CLI provides the following features for you to configure and manage your devices:z Hierarchical command protection where you can only execute the commands at your own or lowerlevels. Refer to Configuring User Privilege Levels and Command Levels for details.z Easy access to on-line help by entering “?”z Abundant debugging information for fault diagnosisz Saving and executing commands that have been executedz Fuzzy match for convenience of input. When you execute a command, you can input part of thecharacters in a keyword. However, to enable you to confirm your operation, the command can beexecuted only when you input enough characters to make the command unique. Take thecommands save, startup saved-configuration, and system-view which start with s as anexample. To save the current configuration, you need to input sa at least; to set the configuration
