show error on missing command

main.go

@@ -17,10 +17,9 @@ func main() {
 	switch os.Args[1] {
 	case "upload_file":
 		commands.UploadFile()
-		//upload_file()
 	case "run_command":
 		commands.RunCommand()
 	default: 
-		fmt.Println("HERE")
+		fmt.Println("Command not found: %s\n", os.Args[1])
 	}
 }