Consider the following Unix shell dialogue, shown with one incomlpete line: $cat >a pwd ^D $...

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Consider the following Unix shell dialogue, shown with one incomlpete line: $cat >a pwd ^D $ ... $a /home/user S What must the contents of the line in the rectangle be? O $ chmod +x a O $ pwd O $ dir O $ chmod 4 a Consider the following Unix shell dialogue, shown with one incomlpete line: $cat >a pwd ^D $ ... $a /home/user S What must the contents of the line in the rectangle be? O $ chmod +x a O $ pwd O $ dir O $ chmod 4 a

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