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What program do you use to list the files in a directory? Which option do you...

What program do you use to list the files in a directory? Which option do you use to display:

All files, including dotfiles (hidden files)

Names in reverse alphabetical order

Entire tree, including all subdirectories

Flags after each name (/ = directory)

Size of each file, in human readable units

Long listings (permissions, owner, and so on)

Information about a directory itself, not its contents

​When you look at a directory listing, what do the entries . and .. mean?

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