diff --git a/Gemfile.lock b/Gemfile.lock
index d64ff4e..2fa4fa5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    os (1.0.1)
+    os (1.1.1)
 
 GEM
   remote: http://rubygems.org/
@@ -27,7 +27,7 @@ PLATFORMS
 DEPENDENCIES
   os!
   rake (~> 0.8)
-  rspec (~> 2.5.0)
+  rspec (>= 2.0)
   test-unit (~> 3)
 
 BUNDLED WITH
diff --git a/README.md b/README.md
index 19f86e4..81f777a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-The OS gem allows for some easy telling if you're on windows or not. 
+The OS gem allows for some easy telling if you're on windows or not.
 
 ```ruby
 require 'os'
@@ -24,12 +24,15 @@ require 'os'
 >> OS.dev_null
 => "NUL" # or "/dev/null" depending on which platform
 
+>> OS.ipv4_private
+=> "192.168.0.106"
+
 >> OS.rss_bytes
 => 12300033 # number of rss bytes this process is using currently.  Basically "total in memory footprint" (doesn't include RAM used by the process that's in swap/page file)
 
 >> puts OS.report
 ==> # a yaml report of helpful values
---- 
+---
 arch: x86_64-darwin10.6.0
 target_os: darwin10.6.0
 target_vendor: apple
@@ -41,7 +44,7 @@ host_cpu: i386
 host: i386-apple-darwin10.6.0
 RUBY_PLATFORM: x86_64-darwin10.6.0
 
->> OS.cpu_count  
+>> OS.cpu_count
 => 2 # number of cores, doesn't include hyper-threaded cores.
 
 >> OS.open_file_command
@@ -72,7 +75,7 @@ RUBY_PLATFORM: x86_64-darwin10.6.0
  :VERSION_CODENAME=>"bionic",
  :UBUNTU_CODENAME=>"bionic"}
 ```
-  
+
 If there are any other features you'd like, let me know, I'll do what I can to add them :)
 
 http://github.com/rdp/os for feedback et al
diff --git a/lib/os.rb b/lib/os.rb
index 4228093..ebd6c87 100644
--- a/lib/os.rb
+++ b/lib/os.rb
@@ -47,7 +47,6 @@ def self.posix?
         true
       end
     end
-
   end
 
   # true for linux, false for windows, os x, cygwin
@@ -69,11 +68,7 @@ def self.freebsd?
 
   def self.iron_ruby?
    @iron_ruby ||= begin
-     if defined?(RUBY_ENGINE) && (RUBY_ENGINE == 'ironruby')
-       true
-     else
-       false
-     end
+     defined?(RUBY_ENGINE) && (RUBY_ENGINE == 'ironruby')
    end
   end
 
@@ -132,7 +127,6 @@ def self.x?
     mac?
   end
 
-
   # amount of memory the current process "is using", in RAM
   # (doesn't include any swap memory that it may be using, just that in actual RAM)
   # raises 'unknown' on jruby currently
@@ -204,7 +198,7 @@ def self.dev_null # File::NULL in 1.9.3+
       if OS.windows?
         "NUL"
       else
-        "/dev/null"
+        File::NULL
       end
     end
   end
@@ -233,25 +227,39 @@ def self.cpu_count
     when /darwin10/
       (hwprefs_available? ? `hwprefs thread_count` : `sysctl -n hw.ncpu`).to_i
     when /linux/
-      `cat /proc/cpuinfo | grep processor | wc -l`.to_i
+      IO.readlines('/proc/cpuinfo').count { |x| x[/^processor/] }
     when /freebsd/
       `sysctl -n hw.ncpu`.to_i
     else
-      if RbConfig::CONFIG['host_os'] =~ /darwin/
+      if File.readable?('/proc/cpuinfo')
+        # JRuby workaround ; should also work on the Android if cpuinfo is available to user
+        IO.readlines('/proc/cpuinfo').count { |x| x[/^processor/] }
+      elsif RbConfig::CONFIG['host_os'] =~ /darwin/
          (hwprefs_available? ? `hwprefs thread_count` : `sysctl -n hw.ncpu`).to_i
       elsif self.windows?
         # ENV counts hyper threaded...not good.
-      	      # out = ENV['NUMBER_OF_PROCESSORS'].to_i
+              # out = ENV['NUMBER_OF_PROCESSORS'].to_i
         require 'win32ole'
         wmi = WIN32OLE.connect("winmgmts://")
         cpu = wmi.ExecQuery("select NumberOfCores from Win32_Processor") # don't count hyper-threaded in this
         cpu.to_enum.first.NumberOfCores
       else
-        raise 'unknown platform processor_count'
+        begin
+          require 'etc'
+          Etc.nprocessors
+        rescue Exception
+          raise 'unknown platform processor_count'
+        end
       end
     end
   end
 
+  def self.ipv4_private
+    require 'socket'
+    ip = Socket.ip_address_list.detect(&:ipv4_private?)
+    ip ? ip.ip? ? ip.ip_unpack[0] : '' : ''
+  end
+
   def self.open_file_command
     if OS.doze? || OS.cygwin?
       "start"
@@ -261,7 +269,6 @@ def self.open_file_command
       # linux...what about cygwin?
       "xdg-open"
     end
-
   end
 
   def self.app_config_path(name)
@@ -283,18 +290,11 @@ def self.app_config_path(name)
   end
 
   def self.parse_os_release
-    if OS.linux? && File.exist?('/etc/os-release')
-      output = {}
+    parse_release('/etc/os-release')
+  end
 
-      File.read('/etc/os-release').each_line do |line|
-        parsed_line = line.chomp.tr('"', '').split('=')
-        next if parsed_line.empty?
-        output[parsed_line[0].to_sym] = parsed_line[1]
-      end
-      output
-    else
-      raise "File /etc/os-release doesn't exists or not Linux"
-    end
+  def self.parse_lsb_release
+    parse_release('/etc/lsb-release')
   end
 
   class << self
@@ -314,4 +314,14 @@ def self.hwprefs_available?
     `which hwprefs` != ''
   end
 
+  def self.parse_release(file)
+    if OS.linux? && File.readable?(file)
+      File.readlines(file).reduce({}) do |output, line|
+        parsed_line = line.strip.delete(?").split('=')
+        parsed_line.empty? ? output : output.merge(parsed_line[0].to_sym => parsed_line[1])
+      end
+    else
+      raise "File #{file} doesn't exist or not Linux"
+    end
+  end
 end