diff --git a/sources/tech/20171124 How do groups work on Linux.md b/sources/tech/20171124 How do groups work on Linux.md
index bc1833b0d6..5071c7a8a3 100644
--- a/sources/tech/20171124 How do groups work on Linux.md	
+++ b/sources/tech/20171124 How do groups work on Linux.md	
@@ -1,3 +1,5 @@
+Translating by DavidChen
+
 How do groups work on Linux?
 ============================================================