fix bash in process control

LFtid1056/cloudfront/boot/stop_fe.sh

@@ -1,12 +1,9 @@
 #!/bin/bash
 
-# @file:    $RCSfile: stop_fe.sh,v $
-# @brief:   $ϵͳӦ<CDB3><D3A6>ֹͣ<CDA3><D6B9><EFBFBD>̽ű<CCBD> 
-# @version: $Revision: 1.5 $
-# @date:    $Date: 2017/02/28 08:40:43 $
-# @author:  $Author: zhanchengguo $
-# @state:   $State: Exp $
-# @latest:  $Id: stop_fe.sh,v 1.5 2017/02/28 08:40:43 zhanchengguo Exp $
+if [ -z "$FEP_ENV" ]; then
+  echo "Error: FEP_ENV is not set. Please set it first."
+  exit 1
+fi
 
 check_log_file()
 {