Dell PowerEdge M805 - Manual (Page 88)

50 Using the CLI
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• 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 First In First Out (FIFO)
basis. These commands can be recalled, reviewed, modified, and reissued. This buffer is not
preserved after switch resets.
By default, the history buffer system is enabled, but it can be disabled at any time. The standard
number of 10 stored commands can be increased to 216. By configuring 0, the effect is the same as
disabling the history buffer system. For information about the command syntax for configuring the
command history buffer, see the history-size command in the Line command mode chapter of this
guide.
Negating Commands
For many commands, the prefix keyword no is entered to cancel the effect of a command or reset
the configuration to the default value. All configuration commands have this capability. This guide
describes the negation effect for all commands to which it applies.
Show Command
The show command executes in the User Executive (EXEC) and Privileged Executive (EXEC)
modes.
Command Completion
CLI can complete partially entered commands when the user presses the <tab> or <space> key.
If a command entered is not complete, is not valid, or if some parameters of the command are not
valid or missing, an error message is displayed to assist in entering the correct command. By
pressing the <tab> key, an incomplete command is changed into a complete command. If the
characters already entered are not enough for the system to identify a single matching command,
the <?>key displays the available commands matching the characters already entered.
Keyword Source or Destination
Up-arrow key
<Ctrl>+<P>
Recalls commands in the history buffer, beginning with the most recent command.
Repeats the key sequence to recall successively older commands.
Down-arrow key
<Ctrl>+<N>
Returns to more recent commands in the history buffer after recalling commands
with the up-arrow key. Repeating the key sequence recalls more recent commands
in succession.