diff --git a/fri/server/main.py b/fri/server/main.py
index 0e6de2c..fa09a18 100644
--- a/fri/server/main.py
+++ b/fri/server/main.py
@@ -3,6 +3,7 @@
 import os
 from subprocess import call
 from pathlib import Path
+import json
 
 
 app = Flask(__name__)
@@ -145,7 +146,7 @@ def download(dir):
         return resp
 
 
-@app.route('/destroy/<dir>', methods=['POST'])
+@app.route('/destroy/<dir>', methods=['DELETE'])
 def destroy(dir):
     cur_path = os.getcwd()
     concore_path = os.path.abspath(os.path.join(cur_path, '../../'))
@@ -157,7 +158,21 @@ def destroy(dir):
     else:
         resp = jsonify({'message': 'There is an Error'})
         resp.status_code = 500
-        return resp        
+        return resp   
+
+@app.route('/getFilesList/<dir>', methods=['POST'])
+def getFilesList(dir):
+    cur_path = os.getcwd()
+    concore_path = os.path.abspath(os.path.join(cur_path, '../../'))
+    dir_path = os.path.abspath(os.path.join(concore_path, dir))
+    res = []
+
+    if(dir=='concore'):
+        res = os.listdir(concore_path)
+    else:
+        res = os.listdir(dir_path) 
+    res2 = json.dumps(res)  
+    return res2              
 
 
 if __name__ == "__main__":
diff --git a/fri/test.py b/fri/test.py
index f552c11..8384597 100644
--- a/fri/test.py
+++ b/fri/test.py
@@ -46,38 +46,27 @@ def download():
 # function to check build
 def build():
   url = "http://127.0.0.1:5000/build/test?fetch=sample1"
-
-  payload={'': ''}
-  files=[]
-  headers = {}
-
-  response = requests.request("POST", url, headers=headers, data=payload, files=files)
-
+  response = requests.request("POST", url)
   print(response.text)
 
 # function to debug
 def debug():
   url = "http://127.0.0.1:5000/debug/sample1"
-
-  payload={'': ''}
-  files=[]
-  headers = {}
-
-  response = requests.request("POST", url, headers=headers, data=payload, files=files)
-
+  response = requests.request("POST", url)
   print(response.text) 
 
 
 #function to destroy dir.
 def destroy():
   url = "http://127.0.0.1:5000/destroy/sample1"
-
-  payload={'': ''}
-  files=[]
-  headers = {}
-
-  response = requests.request("POST", url, headers=headers, data=payload, files=files)
-
+  response = requests.request("DELETE", url)
+
+  print(response.text)  
+  
+def getFilesList():
+  import requests
+  url = "http://127.0.0.1:5000/getFilesList/test"
+  response = requests.request("POST", url)
   print(response.text)   
 
 
@@ -87,4 +76,5 @@ def destroy():
 # build()
 # debug()
 # destroy()
+getFilesList()
 
diff --git a/mkconcore.py b/mkconcore.py
index b971733..4332f23 100644
--- a/mkconcore.py
+++ b/mkconcore.py
@@ -595,6 +595,9 @@
 #remaining code deals only with posix or windows
 
 #copy sourcefiles from ./src into corresponding directories
+if concoretype=="posix":
+    fbuild.write('#!/bin/bash' + "\n")
+
 for node in nodes_dict:
     containername,sourcecode = nodes_dict[node].split(':')
     if len(sourcecode)!=0:
@@ -678,6 +681,9 @@
     i=i+1
 
 #start running source in associated dirs (run and debug scripts)
+if concoretype=="posix":
+    fdebug.write('#!/bin/bash' + "\n")
+
 i=0
 for node in nodes_dict:
   containername,sourcecode = nodes_dict[node].split(':')
@@ -769,7 +775,9 @@
                   else:
                       fdebug.write('concorewd=`pwd`\n')
                       fdebug.write('osascript -e "tell application \\"Terminal\\" to do script \\"cd $concorewd/' +containername+";"+ MATLABEXE+' -batch run\\\\\\(\\\\\\'+"'"+sourcecode+"\\\\\\'"+'\\\\\\)\\""\n' )
-      
+
+if concoretype=="posix":
+    fstop.write('#!/bin/bash' + "\n")
 i=0 #  3/30/21
 for node in nodes_dict:
     containername,sourcecode = nodes_dict[node].split(':')
@@ -784,6 +792,8 @@
     i=i+1
 fstop.close()
 
+if concoretype=="posix":
+    fclear.write('#!/bin/bash' + "\n")
 i=0 #  9/13/21
 for node in nodes_dict:
     containername,sourcecode = nodes_dict[node].split(':')
@@ -799,6 +809,8 @@
     i=i+1
 fclear.close()
 
+if concoretype=="posix":
+    fmaxtime.write('#!/bin/bash' + "\n")
 i=0 #  9/12/21
 for node in nodes_dict:
     containername,sourcecode = nodes_dict[node].split(':')