xStack DGS-3400 Series Layer 2 Gigabit Managed Switch CLI Manual 
 
Figure 2- 2.  The ? Command 
When you enter a command without its required parameters, the CLI will prompt you with a Next possible completions: 
message. 
 
Figure 2- 3.  Example Command Parameter Help 
In this case, the command config account was entered with the parameter <username>. The CLI will then prompt you to enter 
the  <username>  with the message, Next possible completions:. Every command in the CLI has this feature, and complex 
commands have several layers of parameter prompting. 
In addition, after typing any given command plus one space, you can see all of the next possible sub-commands, in sequential 
order, by repeatedly pressing the Tab key. 
To re-enter the previous command at the command prompt, press the up arrow cursor key. The previous command will appear at 
the command prompt. 
 
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