sudo apt-get --purge remove ruby-rvm
sudo rm -rf /usr/share/ruby-rvm /etc/rvmrc /etc/profile.d/rvm.sh

env | grep rvm

sudo \curl -L https://get.rvm.io | sudo bash -s stable
sudo source /etc/profile

rvm list known
rvm install 1.9.3
rvm use 1.9.3

wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p448.tar.gz

tar zxvf ./ruby-1.9.3-p448.tar.gz

./configure --prefix=/usr\
            --program-suffix=1.9.3\
            --with-ruby-version=1.9.3\
            --disable-install-doc

make
sudo apt-get install checkinstall
sudo checkinstall -D -y\
                  --fstrans=no\
                  --nodoc\
                  --pkgname='ruby1.9.3'\
                  --pkgversion='1.9.3-p448'\
                  --provides='ruby'\
                  --requires='libc6,libffi5,libgdbm3,libncurses5,libreadline5,openssl,libyaml-0-2,zlib1g'

update-alternatives --install /usr/bin/ruby ruby /usr/bin/ruby1.9.3 500\
                        --slave   /usr/bin/ri   ri   /usr/bin/ri1.9.3\
                        --slave   /usr/bin/irb  irb  /usr/bin/irb1.9.3\
                        --slave   /usr/bin/gem  gem  /usr/bin/gem1.9.3\
                        --slave   /usr/bin/erb  erb  /usr/bin/erb1.9.3\
                        --slave   /usr/bin/rdoc rdoc /usr/bin/rdoc1.9.3

sudo update-alternatives --remove ri /usr/bin/ri1.8