Some distributions doesn't support SSLv2 due to security flaws. Make sure, you've removed any previous versions of RVM:
sudo apt-get --purge remove ruby-rvm
sudo rm -rf /usr/share/ruby-rvm /etc/rvmrc /etc/profile.d/rvm.sh
Install RVM:
\curl -L https://get.rvm.io |
bash -s stable --ruby --autolibs=enable --auto-dotfiles