diff --git a/xCAT-server/share/xcat/install/scripts/post.rhels7 b/xCAT-server/share/xcat/install/scripts/post.rhels7
index 571e63277..fc3ab7285 100644
--- a/xCAT-server/share/xcat/install/scripts/post.rhels7
+++ b/xCAT-server/share/xcat/install/scripts/post.rhels7
@@ -12,17 +12,3 @@ do
   sed -i '/HWADDR/d' $i
 done
 
-  if[ -f "/usr/lib/systemd/system/NetworkManager.service" ];then
-    systemctl stop NetworkManager
-    systemctl disable NetworkManager
-  fi
-
-  if[ -f "/usr/lib/systemd/system/NetworkManager-dispatcher.service" ];then
-    systemctl stop NetworkManager-dispatcher
-    systemctl disable NetworkManager-dispatcher
-  fi
-  
-  if[ -f "/usr/lib/systemd/system/NetworkManager-wait-online.service" ];then
-    systemctl stop NetworkManager-wait-online
-    systemctl disable NetworkManager-wait-online
-  fi
diff --git a/xCAT/postscripts/xcatinstallpost b/xCAT/postscripts/xcatinstallpost
index 1f7fb68ae..47a2214ee 100755
--- a/xCAT/postscripts/xcatinstallpost
+++ b/xCAT/postscripts/xcatinstallpost
@@ -4,6 +4,7 @@
 #
 #   xCAT script for running postboot scripts for full install case.
 #################################################################
+. /xcatpost/xcatlib.sh
 
 if [ ! `uname` = Linux ]; then
    logger -t xcat -p local4.err "$0: the OS name is not Linux"
@@ -71,6 +72,14 @@ fi
 " >> /xcatpost/mypostscript.post
 fi
 
+stopservice NetworkManager
+stopservice NetworkManager-dispatcher
+stopservice NetworkManager-wait-online
+
+disableservice NetworkManager
+disableservice NetworkManager-dispatcher 
+disableservice NetworkManager-wait-online
+
 chmod +x /xcatpost/mypostscript.post
 if [ -x /xcatpost/mypostscript.post ];then
    /xcatpost/mypostscript.post