uniq

Question 1

uniq

Answer 1

Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standard output).

Question 2

uniq [OPTIONS]

• c
• d
• D
• i
• u

Answer 2

• c, –count, Prefix lines by the number of occurences.
• d, –repeated, Only print duplicate lines, one for each group.
• D, Print all duplicate lines.
• i, –ignore-case, Ignore differences in case when comparing.
• u, –unique, Only print unique lines.

Question 3

uniq [OPTIONS]

• f
• s

Answer 3

• f, –skip-fields=N, Avoid comparing the first N fields.
• s, –skip-chars=N, Avoid comparing the first N characters.