Update TESTING_GNB_W_COTS_UE.md

doc/TESTING_GNB_W_COTS_UE.md

@@ -42,28 +42,37 @@ The photo depicts the FR1 setup part of the scheme above:
 
 ## Build and Install
 
-General guidelines for building :
+General guidelines to build eNB and gNB :
 See https://gitlab.eurecom.fr/oai/openairinterface5g/blob/develop/doc/BUILD.md#building-ues-enodeb-and-gnodeb-executables
 
-- **EPC**
-
-for reference:
-https://github.com/OPENAIRINTERFACE/openair-epc-fed/blob/master-documentation/docs/DEPLOY_HOME.md
-
-
 
 - **eNB**
 
 ```
-sudo 
+cd <your oai installation directory>/openairinterface5g/
+source oaienv
+cd cmake_targets/
+./build_oai -I -w USRP --eNB
+
 ```
 
 - **gNB**
 
 ```
-sudo 
+cd <your oai installation directory>/openairinterface5g/
+source oaienv
+cd cmake_targets/
+./build_oai -I -w USRP --gNB
 ```
 
+
+- **EPC**
+
+for reference:
+https://github.com/OPENAIRINTERFACE/openair-epc-fed/blob/master-documentation/docs/DEPLOY_HOME.md
+
+
+
 ## Configuration Files
 
 Each component (EPC, eNB, gNB) has its own configuration file.