Command Help

uniq : report or omit repeated lines

[SYNOPSIS] uniq OPTION INPUT OUTPUT

OPTION

-c	prefix lines by the number of occurrences
-d	only print duplicate lines, one for each group
-D	print all duplicate lines
-f N	avoid comparing the first N fields
-i	ignore differences in case when comparing
-s N	avoid comparing the first N characters
-u	only print unique lines
-z	line delimiter is NUL, not newline