1. curl -L https://get.rvm.io | bash -s stable –ruby

2. sudo apt-get install zlib1g-dev

3. rvm reinstall 1.9.2-p180

$ rvm reinstall 1.9.3

apt-get install libsqlite3-dev

sudo apt-get install libssl-dev

Than go to the source of ruby and go to the following path

cd ext/openssl

sudo apt-get install libssl-dev

Than go to the source of ruby and go to the following path

cd ext/openssl

Run the command one after the others.

ruby extconf.rb
make
sudo make install