What will be the output of the following Unix command? $rm chap0\[1 – 3\]

Explanation

rm chap* would remove all files beginning with chap. To remove a file whose name contains a special character, escape it with the backslash (\); this is called escaping or despecializing. So rm chap0\[1 – 3\] removes the file named chap0[1 – 3] itself.