Installing downloaded gem using bundler rails

Extract the .gem file into a new directory. After extracting, copy that directory into /vender/gems directory of your application. add the gem into the gemfile( gem "GemName", "Version", :path => "vendor/gems/Gem Directory Name".) . after that run bundle install. Enjoy.

Could not get lock /var/lib/dpkg/lock

solution:

sudo rm /var/lib/apt/lists/lock

Install safari on ubuntu

http://techhamlet.com/2012/03/how-to-easily-install-safari-in-linux-the-new-updated-guide/

Desktop Shortcut ubuntu

http://www.ubuntugeek.com/how-to-create-desktop-launchers-in-ubuntu-11-10oneiric.html

Auto refresh page

"<script language="javascript" type="text/javascript">setTimeout("location.reload();",20000);</script>"

noVNC

http://jorgenmodin.net/index_html/archive/2010/11/30/novnc-vnc-screen-sharing-in-the-web-browser

http://www.youtube.com/watch?v=i9GauBAaQXI

ruby step iterator

A loop from 0 to 12 by 3 can be written as follows.
0.step(12, 3) {|x| print x, " " }
produces:
0 3 6 9 12