Question

Which command is used for locating repeated and non-repeated lines?

(a) sort

(b) uniq

(c) cut

(d) paste

This question was addressed to me by my college director while I was bunking the class.

This key question is from Unique and tr Command in section Simple Filters of Unix

Answer 1

The correct choice is (b) uniq

To elaborate: When we concatenate or merge files, we can encounter the problem of duplicate entries creeping in. UNIX offers a special command (uniq) which can be used to handle these duplicate entries. We can also use the sort -u command for doing the same piece of work.