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Implement a command line interpreter (or a shell). The shell should operatein this basic way: a. When you type in a command (in response to its prompt), the shell creates a child process that executes the command you entered and then prompts for more user input when the child has finished.
b. The shells you implement will be similar to, but much simpler than, the one you run every day in Unix.

For this task, you do not need to implement much functionality; but you will need to be able to handle running multiple commands simultaneously.

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