Dell PowerEdge M420 Reference Manual page 164

Partial keyword lookup — A command is incomplete and the <?> key is
•
entered in place of a parameter. The matched parameters for this
command are displayed.
The following features and conventions are applicable to CLI command entry
and editing:
• History Buffer
• Negating Commands
• Show Command
• Command Completion
• Short Form Commands
• Keyboard Shortcuts
• Operating on Multiple Objects (Range)
• Command Scripting
• CLI Command Notation Conventions
• Interface Naming Conventions
History Buffer
Every time a command is entered in the CLI, it is recorded in an internally
managed Command History buffer. Commands are stored in the buffer,
which operates on a
recalled, reviewed, modified, and reissued. This buffer is not preserved after
switch resets.
164
Using the CLI
First In First Out (FIFO)
basis. These commands can be