diff --git a/source/C/command_line.rst b/source/C/command_line.rst
index 4afe97eb..885f419a 100644
--- a/source/C/command_line.rst
+++ b/source/C/command_line.rst
@@ -35,7 +35,7 @@ To change to another directory an important command is
 
    cd [dir] 
 
-where [dir] is the directory you want to switch to.
+where [dir] is the directory you want to switch to. Another thing that is useful is you can append .. after cd to make it go up one level.