diff --git a/sources/tech/20160826 Understanding Different Classifications of Shell Commands and Their Usage in Linux.md b/sources/tech/20160826 Understanding Different Classifications of Shell Commands and Their Usage in Linux.md
index 29b3bf04da..c9b4836f4c 100644
--- a/sources/tech/20160826 Understanding Different Classifications of Shell Commands and Their Usage in Linux.md	
+++ b/sources/tech/20160826 Understanding Different Classifications of Shell Commands and Their Usage in Linux.md	
@@ -1,3 +1,4 @@
+translating by ucasFL
 Understanding Different Classifications of Shell Commands and Their Usage in Linux
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