Install Ruby 1.9.2

ruby_1_9_2

$ sudo apt-get install gcc g++ build-essential libssl-dev libreadline5-dev zlib1g-dev linux-headers-generic
$ sudo apt-get install libc6-dev libssl-dev libmysql++-dev libsqlite3-dev make
$ wget ftp://ftp.ruby-lang.org//pub/ruby/1.9/ruby-1.9.2-p0.tar.gz
$ tar -xvzf ruby-1.9.2-p0.tar.gz
$ cd ruby-1.9.2-p0/
$ ./configure --prefix=/usr/local/ruby
$ make && sudo make install
$ sudo nano /etc/environment
  
    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/ruby/bin"

$ source /etc/environment
$ ruby -v
$ sudo ln -s /usr/local/ruby/bin/ruby /usr/local/bin/ruby
$ sudo ln -s /usr/local/ruby/bin/gem /usr/bin/gem
$ sudo ln -s `which rake` /usr/local/bin/
$ sudo gem update --system
$ sudo gem install rails passenger home_run whenever --no-rdoc --no-ri
$ sudo home_run --install
$ sudo gem update passenger && sudo gem cleanup
$ sudo passenger-install-nginx-module