Which command provides a detailed usage report for various commands previously executed?

The command that provides a detailed usage report for various commands previously executed is "history." When you run this command in a Linux shell, it displays a list of all the commands that have been entered during the current session or even from previous sessions, depending on the configuration. Each command is typically prefixed with a number, allowing users to easily reference and reuse those commands.

The "history" command is especially useful for cross-referencing previous commands, diagnosing issues, or reconstructing steps taken during a session. It enhances productivity for users by offering a convenient way to re-execute commands without needing to type them all out again.

In contrast, the other options listed do not serve that specific purpose. "Report," "summary," and "usage" are not standard Linux commands that track or display command history in the same way. Thus, the correct choice is effectively the one that provides a clear listing of past commands, which is the history command.