Install Rails 3.2 using rvm on redhat

Upgrade Packages

yum update

Installing Recommended Packages

yum install gcc-c++ patch readline readline-devel zlib zlib-devel 
yum install libyaml-devel libffi-devel openssl-devel make 
yum install bzip2 autoconf automake libtool bison iconv-devel

Install RVM ( Ruby Version Manager )

$ curl -L get.rvm.io | bash -s stable

Install Required Ruby Version

$ rvm install 1.9.3

Install rails

$ gem install rails --version '3.2.19'

Install Rails 3.2 with Ruby 1.9.3 using rvm in Ubuntu 14.0.1

Check ruby is already installed in your system or not

$ ruby -v

Install curl if not installed

$ sudo apt-get install curl

Check curl version by

$ curl --version

Install RVM

Execute the command in the terminal

$ curl -L https://get.rvm.io | bash -s stable

If the installation is done, close the terminal window and open it again to load the rvm into the shell

Check rvm version

$ rvm -v

rvm 1.25.30 (stable) by Wayne E. Seguin , Michal Papis  [https://rvm.io/]

List rvm known rubies

$ rvm list known

Use rvm to install ruby 1.9.3

$ rvm install 1.9.3

Check the ruby versions available

$ rvm list rubies

Check the ruby version by

$ ruby -v

If this again shows the message to install ruby, then set this ruby version as default

$ rvm use ruby-1.9.3-p547 --default

then check ruby -v

Make gem package up to date

$ gem update

Install Rails 3.2.19

$ gem install rails --version '3.2.19'

Check rails version

$ rails -v

You are ready to go!

ThinkingSphinx::SphinxError (undefined method `next_result’ for Mysql2 (rails 3)

I got this error after my thinking sphinx updation to the newest version of ‘3.0.5’. The error shows in the exact line of the code Model.search in my Rails controller. I updated my mysql2 version to ‘0.3.13’, and the issue is solved.
So in you Gemfile update the mysql2 version:

gem 'mysql2', '0.3.13'

And do

$ bundle install

Install Rails 4.0 with Ruby 2.0

Get the stable version of rvm:

$ rvm get stable

Install Ruby 2.0

$ rvm install ruby-2.0.0

Create a Gemset;

$ rvm gemset create rails-4.0

Goto that gemset:

$ rvm use ruby-2.0.0-p247@rails-4.0

Install Rails 4.0 

$ gem install rails --version=4.0

Create an rvmrc file in root folder:

$ vim rvmrc
$ rvm --rvmrc use ruby-2.0.0-p247@rails-4.0

uncomment the line gem ‘therubyracer’, platforms: :ruby from Gemfile

Start the server: 

$ rails s

You are ready to go!!

Changes that you may need to perform while working with Rails 4 compared to old versions:

1. Check here for the New changes in Rails 4
http://net.tutsplus.com/tutorials/ruby/digging-into-rails-4/
http://www.alfajango.com/blog/rails-4-whats-new/
http://www.sitepoint.com/get-your-app-ready-for-rails-4/
2. If you are using devise gem use devise version 3 or above (http://blog.plataformatec.com.br/2013/05/devise-and-rails-4/)

rake assets:precompile – database configuration does not specify adapter

Even if we are specified the database configuration for adapter in our database.yml, sometimes we are getting the error “database configuration does not specify adapter”. Usually you are doing the command for development 

$ rake assets:precompile -t

And in your database.yml, configuration for development is specified. But if you are doing 

$ rake assets:precompile -t RAILS_ENV=development

then you can see the error goes.
Another way is check your database.yml for production database configuration is there or not. If you adds the production database configuration then also it works! Because while doing the precompile for assets without specifying the environment then it checks all environments db configuration.

Another way is add the following in your application.rb file

config.assets.initialize_on_precompile = false

then also it works.

Sphinx Configuration error: Mysql2::Error (Can’t connect to MySQL server on ‘127.0.0.1’ (111))

While setting up a Rails project in my machine, I got this error. First I can’t understand why this error coming, because I am successfully using mysql database in this project, and mysql server is running in my system. The error line number shows near the Sphinx code ‘Model.search’, then I understood this is because of the wrong set up of my sphinx configuration. But why this error? I read some documents and understood that sphinx internally using mysql protocol, so showing this error. Anyway I am checking my sphinx configuration, and no yml config file of sphinx found! So I have some works to do now!

I followed these steps,
Configure Sphinx in Rails 3.2

And all works fine!!

Install thinking Sphinx in Ubuntu 13.04 and set up in Rails 3.2

Check sphinx is already installed in your system,

$ search

If you have already sphinx installed then it will show the sphinx version and other info, else it shows ubuntu information to install.

Download thinking sphinx from
here,

$ tar -xzf sphinx-2.0.8-release.tar.gz
$ cd sphinx-2.0.8-release/
$ ./configure
$ make
$ sudo make install

Type, 

$ search

it will show the sphinx release and the other information.
Add the sphinx gem into your Gemfile

gem 'thinking-sphinx'

Do bundle install

$ bundle install

I assume you already made the model / controller code for sphinx. Else see this
Index all your records

$ rake ts:index -t

While indexing sphinx will generate the configuration file inside RAILS_ROOT/config/config/development.sphinx.conf

If you need to generate only configuration file not indexing you can use this command

$ rake ts:configure -t

Run sphinx searchd daemon

$ rake ts:start -t

You can stop sphinx searchd daemon

$ rake ts:stop -t

You can reindex so that sphinx will re index all records without creating a configuration file.

$ rake ts:reindex -t

Enjoy Sphinx searching!

Install Skype in Ubuntu 13.04

For 32 bit:

Install Dependencies.

$ sudo apt-get install libqt4-webkit

Download and install Skype

$ wget -O skype-linux.deb http://download.skype.com/linux/skype-ubuntu-lucid_4.2.0.11-1_i386.deb
$ sudo dpkg -i skype-linux.deb
$ sudo apt-get -f install

Open the terminal and type

$ skype

Done.

Reference:
noobslab install skype