ruby install

http://rubyonrails.org/download
ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz

scp ruby-1.9.3-p0.tar yourserver:yourpath

server login
cd yourpath
tar -xvf ruby-1.9.3-p0.tar
cd ruby-1.9.3-p0
./configure
make
make test
sudo make install


$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]