diff --git a/cheat/cheatsheets/uniq b/cheat/cheatsheets/uniq
index a2bcfc5..18ee084 100644
--- a/cheat/cheatsheets/uniq
+++ b/cheat/cheatsheets/uniq
@@ -1,4 +1,5 @@
 # show all lines without duplication
+# "sort -u" and "uniq" is the same effect.
 sort file | uniq
 # show not duplicated lines
 sort file | uniq -u