Update README to set ndn-cxx shared library path

Change-Id: Iaa36cc36294119cecf40d5ab55a5b505a02ae0d5
diff --git a/README.md b/README.md
index a6ec745..ea245de 100644
--- a/README.md
+++ b/README.md
@@ -117,13 +117,16 @@
   ./build/catalog/unit-tests
 </pre>
 
-* Note that you may need to set the LD_LIBRARY_PATH to include the path where the ndn-cxx shared
-library is installed. For example:
+* Note that if you are using Fedora or Ubuntu, you may need to create a configuration file for
+ndn-cxx in /etc/ld.so.conf.d to include the path where the libndn-cxx.so is installed. Then
+update using command below:
 <pre>
-  export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
   ldconfig
 </pre>
 
+*For example, if the libndn-cxx.so is installed in /usr/local/lib64, you need to include
+this path in a "ndn-cxx.conf" file in /etc/ld.so.conf.d directory, and then run "ldconfig".
+
 
 Running ndn-atmos
 --------------------------
@@ -175,13 +178,16 @@
     nfd-start
 </pre>
 
-* Note that you may need to set the LD_LIBRARY_PATH to include the path where the ndn-cxx shared
-library is installed. For example:
+* Note that if you are using Fedora or Ubuntu, you may need to create a configuration file for
+ndn-cxx in /etc/ld.so.conf.d to include the path where the libndn-cxx.so is installed. Then
+update using command below:
 <pre>
-  export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
   ldconfig
 </pre>
 
+*For example, if the libndn-cxx.so is installed in /usr/local/lib64, you need to include
+this path in a "ndn-cxx.conf" file in /etc/ld.so.conf.d directory, and then run "ldconfig".
+
 
 Launching atmos-catalog
 -----------------------