Set up local configuration

Install Ruby and RoR for Unix systems

Install RVM in single user mode

http://beginrescueend.com/rvm/install/

Install Ruby 1.9.3

$rvm install 1.9.3

Try to use Ruby

You need to use RVM use before to use Ruby
$rvm use 1.9.3

$ruby -v

Install rails 3.1.3

You need to install this dependencies before
#apt-get install sqlite

If using Debian Squeeze, add the sid repository to source.list:

echo deb http://ftp.us.debian.org/debian/ sid main > /etc/apt/sources.list.d/sid.list

#apt-get install nodejs
$gem install rails -v 3.1.3

If you have a problem with zlib, follow this link https://rvm.beginrescueend.com/packages/zlib/