diff --git a/cheat/cheatsheets/sed b/cheat/cheatsheets/sed
index f60b269..b9b5f1a 100644
--- a/cheat/cheatsheets/sed
+++ b/cheat/cheatsheets/sed
@@ -12,3 +12,6 @@ sed -i -r 's/^\s+//g' file.txt
 
 # Remove empty lines and print results to stdout:
 sed '/^$/d' file.txt
+
+# replace newlines in multiple lines
+sed ':a;N;$!ba;s/\n//g'  file.txt