Question

Which one of the following option is used for OR operation in test command?

(a) -o

(b) -a

(c) -e

(d) -an

This question was addressed to me in my homework.

I'm obligated to ask this question of Using test and [ ] to Evaluate Expressions topic in chapter Essential Shell Programming of Unix

Answer 1

Correct choice is (a) -o

For explanation I would say: test also permits the checking of more than one condition in the same line using -o (OR) operator. For example,