diff --git a/images/linux/ubuntu1604.json b/images/linux/ubuntu1604.json
index c0d3b39d..9d8a11ba 100644
--- a/images/linux/ubuntu1604.json
+++ b/images/linux/ubuntu1604.json
@@ -100,6 +100,7 @@
         },
         {
             "type": "shell",
+            "execute_command": "chmod +x {{ .Path }}; sudo {{ .Vars }} {{ .Path }}",
             "scripts":[
                 "{{template_dir}}/scripts/installers/preparemetadata.sh"
             ],
@@ -108,8 +109,7 @@
                 "METADATA_FILE={{user `metadata_file`}}",
                 "HELPER_SCRIPTS={{user `helper_script_folder`}}",
                 "ANNOUNCEMENTS={{user `announcements`}}"
-            ],
-            "execute_command": "sudo sh -c '{{ .Vars }} {{ .Path }}'"
+            ]
         },
         {
             "type": "shell",
diff --git a/images/linux/ubuntu1804.json b/images/linux/ubuntu1804.json
index 95de0713..aacfe4ee 100644
--- a/images/linux/ubuntu1804.json
+++ b/images/linux/ubuntu1804.json
@@ -103,6 +103,7 @@
         },
         {
             "type": "shell",
+            "execute_command": "chmod +x {{ .Path }}; sudo {{ .Vars }} {{ .Path }}",
             "scripts":[
                 "{{template_dir}}/scripts/installers/preparemetadata.sh"
             ],
@@ -111,8 +112,7 @@
                 "METADATA_FILE={{user `metadata_file`}}",
                 "HELPER_SCRIPTS={{user `helper_script_folder`}}",
                 "ANNOUNCEMENTS={{user `announcements`}}"
-            ],
-            "execute_command": "sudo sh -c '{{ .Vars }} {{ .Path }}'"
+            ]
         },
         {
             "type": "shell",
diff --git a/images/linux/ubuntu2004.json b/images/linux/ubuntu2004.json
index 8e2b69e4..17e9143d 100644
--- a/images/linux/ubuntu2004.json
+++ b/images/linux/ubuntu2004.json
@@ -105,6 +105,7 @@
         },
         {
             "type": "shell",
+            "execute_command": "chmod +x {{ .Path }}; sudo {{ .Vars }} {{ .Path }}",
             "scripts":[
                 "{{template_dir}}/scripts/installers/preparemetadata.sh"
             ],
@@ -113,8 +114,7 @@
                 "METADATA_FILE={{user `metadata_file`}}",
                 "HELPER_SCRIPTS={{user `helper_script_folder`}}",
                 "ANNOUNCEMENTS={{user `announcements`}}"
-            ],
-            "execute_command": "sudo sh -c '{{ .Vars }} {{ .Path }}'"
+            ]
         },
         {
             "type": "shell",