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Write the UNIX commands to: Find all logged-in users with usernames of at least four characters. Find all users on your system whose user ids

Write the UNIX commands to:

Find all logged-in users with usernames of at least four characters.

Find all users on your system whose user ids are greater than 99.

Find the number of users on your system whose user ids are greater than 99.

List all the files in your directory in decreasing order of file size.

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