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In Node.js, you cannot delete the terminal itself, but you can clear the terminal screen by running the command clear or CTRL + L (on most terminals).

To go back to previous commands, you can use the Up and Down arrow keys on your keyboard to cycle through the command history. Alternatively, you can use the history command to view a list of previous commands and their numbers, then use the !! command to execute the last command or !n (where n is the command number) to execute a specific command from the history.