1-15
During daily maintenance or when the system is operating abnormally, you need to view each module’s
running status to find the problem. Therefore, you are required to execute the corresponding display
commands one by one. To collect more information one time, you can execute the display
diagnostic-information command in any view to display or save statistics of each module’s running
status. The execution of the display diagnostic-information command has the same effect as that of
the 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 the System
Volume.
z Support for the display configure-user and display current-configuration command depends on the
device model.
z The display commands discussed above are for the global configuration. Refer to the
corresponding section for the display command for specific protocol and interface.
CLI Features
This section covers the following topics:
z Introduction to CLI
z Online Help with Command Lines
z Synchronous Information Output
z Undo Form of a Command
z Editing Features
z CLI Display
z Saving History Command
z Command Line Error Information
Introduction to CLI
CLI is an interaction interface between devices and users. Through CLI, you can configure your devices
by entering commands and view the output information and verify your configurations, thus facilitating
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 lower
levels. 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 diagnosis
z Saving and executing commands that have been executed
z Fuzzy match for convenience of input. When you execute a command, you can input part of the
characters in a keyword. However, to enable you to confirm your operation, the command can be
executed only when you input enough characters to make the command unique. Take the
commands save, startup saved-configuration, and system-view which start with s as an
example. To save the current configuration, you need to input sa at least; to set the configuration
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