install ruby from download

sudo apt-get -y install zlib1g-dev libssl-dev libreadline5-dev libyaml-dev build-essential bison checkinstall

cd ruby-1.9.2-p290
./configure --prefix=/usr\
--program-suffix=1.9.2\
--with-ruby-version=1.9.2\
--disable-install-doc
make
sudo checkinstall -D -y\
--fstrans=no\
--nodoc\
--pkgname='ruby1.9.2'\
--pkgversion='1.9.2-p290'\
--provides='ruby'\
--requires='libc6,libffi5,libgdbm3,libncurses5,libreadline5,openssl,libyaml-0-2,zlib1g'\
--maintainer=brendan.ribera@gmail.com
sudo update-alternatives --install /usr/bin/ruby ruby /usr/bin/ruby1.9.2 500\
--slave /usr/bin/ri ri /usr/bin/ri1.9.2\
--slave /usr/bin/irb irb /usr/bin/irb1.9.2\
--slave /usr/bin/gem gem /usr/bin/gem1.9.2\
--slave /usr/bin/erb erb /usr/bin/erb1.9.2\
--slave /usr/bin/rdoc rdoc /usr/bin/rdoc1.9.2