HADOOP-12870. Fix typo admininistration in CommandsManual.md. Contributed by John Zhuge.

(cherry picked from commit eb864d35d6c5f0c0af67032d5f6925aa123273af)
(cherry picked from commit 9e87f59dea25ebb90e7bc3ae640da25c4b8e9a82)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -65,6 +65,9 @@ Release 2.7.3 - UNRELEASED
     HADOOP-9121. InodeTree.java has redundant check for vName while
     throwing exception. (Arup Malakar via suresh)
 
+    HADOOP-12870. Fix typo admininistration in CommandsManual.md.
+    (John Zhuge via aajisaka)
+
 Release 2.7.2 - 2016-01-25
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/site/markdown/CommandsManual.md

@@ -66,7 +66,7 @@ Many subcommands honor a common set of configuration options to alter their beha
 Hadoop Common Commands
 ======================
 
-All of these commands are executed from the `hadoop` shell command. They have been broken up into [User Commands](#User_Commands) and [Admininistration Commands](#Administration_Commands).
+All of these commands are executed from the `hadoop` shell command. They have been broken up into [User Commands](#User_Commands) and [Administration Commands](#Administration_Commands).
 
 User Commands
 -------------