diff --git a/package_linter.py b/package_linter.py
index 2883784..88ad7bc 100755
--- a/package_linter.py
+++ b/package_linter.py
@@ -402,6 +402,7 @@ class Script():
         self.check_set_usage()
         self.check_helper_usage_dependencies()
         self.check_deprecated_practices()
+        self.check_source_common()
 
     def check_verifications_done_before_modifying_system(self):
         """
@@ -518,6 +519,26 @@ class Script():
             )
 
 
+    def check_source_common(self):
+        #test for standard execution
+        if script["name"] in ["install","upgrade","remove"]:
+            count_common=len(re.findall("^source _common.sh",script["raw"],flags=re.MULTILINE))
+            if count_common == 0:
+                print_warning("Calling _common.sh seams not present in this script, please add \"source _common.sh\"")
+            elif count_common > 1:
+                print_warning("Duplicates calls to _common.sh, please clean your code")
+
+        #test for "save" files
+        else:
+            count_common=len(re.findall("^source _common.sh",script["raw"],flags=re.MULTILINE))
+            count_common_save=len(re.findall("^source ../settings/scripts/_common.sh",script["raw"],flags=re.MULTILINE))
+            if count_common > 0 and count_common_save == 0:
+                print_error("You must call _common.sh with \"source ../settings/scripts/_common.sh\" in this script to respect context execution")
+            elif count_common == 0 and count_common_save == 0:
+                print_warning("Calling _common.sh seams not present in this script, please add \"source ../settings/scripts/_common.sh\" in this script to respect context execution")
+            elif count_common_save > 1:
+                print_warning("Duplicates calls to _common.sh, please clean your code")
+
 def main():
     if len(sys.argv) != 2:
         print("Give one app package path.")
@@ -526,6 +547,7 @@ def main():
     app_path = sys.argv[1]
     header(app_path)
     App(app_path).analyze()
+
     sys.exit(return_code)