diff --git a/CDC_Backend/APIs/admin.py b/CDC_Backend/APIs/admin.py
index 0ea3511..31b5b81 100644
--- a/CDC_Backend/APIs/admin.py
+++ b/CDC_Backend/APIs/admin.py
@@ -60,7 +60,6 @@ def model_admin_url(obj, name=None) -> str:
 class StudentAdmin(ImportExportMixin, SimpleHistoryAdmin):
     pass
 
-
 @admin.register(Student)
 class Student(StudentAdmin):
     list_display = ("roll_no", "name", "batch", "branch", "phone_number", 'can_apply')
@@ -79,6 +78,14 @@ class Student(StudentAdmin):
         queryset.update(can_apply=True)
         self.message_user(request, "Registered the users")
 
+class PlacementResources(resources.ModelResource):
+    class Meta:
+        model = Placement
+        exclude = ('id','changed_by', 'is_company_details_pdf', 'is_description_pdf',
+         'is_compensation_details_pdf', 'is_selection_procedure_details_pdf')
+class AdminAdmin(ExportMixin, SimpleHistoryAdmin):
+    resource_class = PlacementResources
+
 
 class PlacementResources(resources.ModelResource):
     class Meta:
@@ -104,7 +111,6 @@ class PlacementApplicationResources(resources.ModelResource):
         model = PlacementApplication
         exclude = ('id', 'changed_by')
 
-
 class PlacementAdmin(ExportMixin, SimpleHistoryAdmin):
     resource_class = PlacementApplicationResources
 
@@ -128,7 +134,6 @@ class PrePlacementResources(resources.ModelResource):
         model = PrePlacementOffer
         exclude = ('id', 'changed_by')
 
-
 class PrePlacementOfferAdmin(ExportMixin, SimpleHistoryAdmin):
     resource_class = PrePlacementResources
 
diff --git a/README.md b/README.md
index a4495bb..bae49a2 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,8 @@ python# CDC - Backend
 2. Create a Virtual Environment in the [CDC_Backend](./) folder with this command below <br>
    `python -m venv venv`
 3. Activate the environment with this command <br>
-   `.\venv\Scripts\activate`
+   `.\venv\Scripts\activate` (for WINDOWS) <br>
+   `source ./venv/bin/activate` (for LINUX)
 4. Install the dependencies <br>
    `pip install -r requirements.txt `
 5. Ensure that you have the PostgreSQL installed on your machine and is running on PORT **5432** <br>
@@ -17,7 +18,8 @@ python# CDC - Backend
 ### Running the Application
 
 1. Activate the environment with this command. <br>
-   `.\venv\Scripts\activate`
+   `.\venv\Scripts\activate` (for WINDOWS) <br>
+   `source ./venv/bin/activate` (for LINUX) 
 2. Start the application by running this command (_Run the command where [manage.py](./CDC_Backend/manage.py) is
    located_) <br>
    ` python manage.py runserver`
diff --git a/doc/setup/postgres.md b/doc/setup/postgres.md
new file mode 100644
index 0000000..d3dba5e
--- /dev/null
+++ b/doc/setup/postgres.md
@@ -0,0 +1,16 @@
+typical conf file for pg_hba.conf for dev work.
+
+
+# TYPE  DATABASE        USER            ADDRESS                 METHOD
+
+# "local" is for Unix domain socket connections only
+local   all             all                                     md5
+# IPv4 local connections:
+host    all             all             127.0.0.1/32            md5
+# IPv6 local connections:
+host    all             all             ::1/128                 md5
+# Allow replication connections from localhost, by a user with the
+# replication privilege.
+local   replication     all                                     peer
+host    replication     all             127.0.0.1/32            ident
+host    replication     all             ::1/128                 ident
\ No newline at end of file