Question

Which option is used with pr command to display output along with line numbers?

(a) -d

(b) -n

(c) -o n

(d) -t

I have been asked this question at a job interview.

This intriguing question originated from Filtering Commands topic in division Simple Filters of Unix

Answer 1

Right option is (b) -n

Easiest explanation: pr command offers many options which are used for producing the output in just the format we need. For example,

-d    double spaces input

-n    numbers lines, helps in debugging code

-o n    offsets lines by n spaces, increases left margin of the page