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____ option is used with a test for checking if the file exists and has the size greater than zero.

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____ option is used with a test for checking if the file exists and has the size greater than zero.

(a) -f

(b) -r

(c) -e

(d) -s

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I'd like to ask this question from Shell Programming using Various Commands topic in division Essential Shell Programming of Unix

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Right answer is (d) -s

Explanation: test can also be used for performing various file tests like checking whether the file is a regular file, or is it readable, writable or executable. To check whether the file exists and has the size greater than zero, we have to use -s option with test. For example,

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