diff --git a/.pryrc b/.pryrc
index 0d985d2..7129e54 100644
--- a/.pryrc
+++ b/.pryrc
@@ -1,5 +1,3 @@
-require 'require_all'
-
 class Array
  # group elements by their identity, and count each distinct item
  def counts
@@ -18,17 +16,3 @@ end
 Pry::Commands.command /^$/, "repeat last command" do
   _pry_.run_command Pry.history.to_a.last
 end
-
-
-# Obtain the present woking directory
-current_dir = Dir.pwd
-
-if current_dir =~ /^(.*?\/misc_rbtools)/
-  require_all './modules'
-  require_all './classes'
-end
-
-nvd_downloader = NvdTools::NvdDownloader.new
-scans_io_downloader = ScansIoTools::ScansIoDownloader.new
-scans_io_parser = ScansIoTools::ScansIoIndexParser.new(scans_io_downloader.get_json_index.body)
-
diff --git a/Dockerfile b/Dockerfile
index f7d5a55..1918cf7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,15 @@
 # uncomment the version of ruby that you want to run
 #FROM ruby:2.4
 #FROM ruby:2.5
-FROM ruby:2.6
+#FROM ruby:2.6
+FROM quay.io/kennasecurity/ruby
+#---
+# FEDORA with kennasecurity/ruby 
+USER root
+RUN dnf install less -y && dnf clean all -y
+#---
+
+ENV PAGER less
 
 RUN mkdir /usr/src/misc_rbtools 
 ADD . /usr/src/misc_rbtools/ 
@@ -13,8 +21,6 @@ RUN gem install rest-client
 RUN gem install require_all
 RUN gem install pry
 
-RUN apt -y install less
-
 WORKDIR /usr/src/misc_rbtools
 
-CMD pry
+CMD command_line/console.rb
diff --git a/classes/scans_io_index_parser.rb b/classes/scans_io_index_parser.rb
index bba4788..e0f4aae 100644
--- a/classes/scans_io_index_parser.rb
+++ b/classes/scans_io_index_parser.rb
@@ -59,7 +59,11 @@ module ScansIoTools
     end
 
     def size_for(study_name)
-      file_info(study_name).first['size']
+      if file_info(study_name).count >= 2
+        file_info(study_name).select {|name| name['size']}
+      else
+        file_info(study_name).first['size']
+      end
     end
   end
-end
+end
\ No newline at end of file
diff --git a/command_line/console.rb b/command_line/console.rb
new file mode 100755
index 0000000..7629999
--- /dev/null
+++ b/command_line/console.rb
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+require "require_all"
+require "pry"
+
+# Obtain the present woking directory
+current_dir = Dir.pwd
+
+if current_dir =~ /^(.*?\/misc_rbtools)/
+  require_all '../modules'
+  require_all '../classes'
+end
+
+# different downloading tools 
+nvd_downloader = NvdTools::NvdDownloader.new
+scans_io_downloader = ScansIoTools::ScansIoDownloader.new
+scans_io_parser = ScansIoTools::ScansIoIndexParser.new(scans_io_downloader.get_json_index.body)
+
+Pry.start