Install Adobe Reader/Flash on Ubuntu 12.04

1. To install Adobe Flash/Reader, enable canonical partner repository by running below command

$ sudo apt-add-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

2. Update the system and install Adobe Flash Player & Adobe Reader

$ sudo apt-get update
$ sudo apt-get install flashplugin-installer acroread

I hope it may helpful to install Adobe Flash Player & Adobe Reader on ubuntu 12.04 without any issues.

Install Adobe AIR on Ubuntu 12.04

1. Download Latest Version Adobe Air for Linux

$ wget http://airdownload.adobe.com/air/lin/download/latest/AdobeAIRInstaller.bin

2. Change the persmission of the file

$ chmod +x ./AdobeAIRInstaller.bin

3. Install Adobe Air

$ sudo ./AdobeAIRInstaller.bin

While installing if you get message about missing gnome-keyring or KDE Wallet, then run the below command to fix it

$ sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0/usr/lib/libgnome-keyring.so.0
$ sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0.2.0/usr/lib/libgnome-keyring.so.0.2.0

For 64-bit systems

$ sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0/usr/lib/libgnome-keyring.so.0
$ sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0.2.0/usr/lib/libgnome-keyring.so.0.2.0

Re-run installer again

I hope you have successfully installed Adobe Air, In case if your facing any issues let me know.

Google-chrome-stable depends on libnss3-1d (>= 3.12.3); And Google-chrome-stable depends on libxss1;

When you trying to install google chrome on Ubuntu 12.04, you may end up with this error message

$ dkpg -i google-chrome-stable_current_i386.deb

Google-chrome-stable depends on libnss3-1d (>= 3.12.3);  however;
Package libnss3-1d is not installed.
Google-chrome-stable depends on libxss1; however;
Package libxss1 is not installed
dkpg: error processing google-chrome-stable (--install)

To fix this issue you need to install those missing packages. Here are commands to install those packages

$ sudo apt-get install libnss3-1d:i386
$ sudo apt-get install libxss1:i386

Then try

$ dkpg -i google-chrome-stable_current_i386.deb

I hope this time you can able to install Google Chrome without any issues.

Rails 3 - Bundler

Bundler

Bundler is used to manage your application's gem dependencies. By default all Rails 3 application contains bundler gem.

If your applications need gems other than those belonging to Rails itself, you'll need to specify those gems into manifest file named Gemfile into the root of your Rails project directory.

Simple syntax to load gem

gem "paperclip"
gem "rspec"

Syntax to load gem on specific application environment

group :development, :test do
   gem "rspec"
end

Syntax to load specific gem version

gem "rspec" , "1.2"
gem "rspec", "> 1.2"

Syntax to load gem form a Git Repository

gem "paperclip", :git => "git://github.com/thoughtbot/paperclip.git"

Installing Gems

Once you update the Gemfile then make sure you have installed all the dependencies in your Gemfile of Rails 3 applications.

$ bundle install
$ bundle install --without test

These commands will install all gem dependencies on your Rails 3 application which is specified on Gemfile.

Packing Gems

You can package up all your gems in the vendor/cache directory inside of your Rails 3 applications.

Here is the syntax to package up

$ bundle package

I hope you have some idea about Bundler and how it helpful in Rails 3 applications. If you need any clarifications please let me know.

Vaadin 6.8.1

Vaadin version 6.8.1 has been released. Here is more details about fixes/changes and downloads

http://vaadin.com/download/release/6.8/6.8.1/release-notes.html