+#!/usr/bin/perl -w
+use strict;
+
+if( -e "/usr/bin/apt-get")
+{
+ my($ruby_version)=`apt-cache search ruby1.9.*-dev`;
+
+ $ruby_version =~ s/-dev.*//g;
+ chomp $ruby_version;
+
+ print "ruby to install $ruby_version $ruby_version-dev\n";
+ `sudo apt-get install -y $ruby_version $ruby_version-dev`;
+
+ print "ln -sf /usr/bin/$ruby_version /usr/bin/ruby\n";
+ `sudo ln -sf /usr/bin/$ruby_version /usr/bin/ruby`;
+
+ $ruby_version=`ruby --version`;
+ print "ruby = $ruby_version";
+}
+elsif(-e "/usr/bin/yum")
+{
+ `sudo yum -y -q install ruby-devel ruby`
+}