nvm
$ sudo apt-get install build-essential libssl-dev pkg-config git-core $ git clone git://github.com/creationix/nvm.git ~/.nvm $ . ~/.nvm/nvm.sh $ nvm install v0.3.3 $ nvm use v0.3.3
$ vi .bash_profile ----- . ~/.nvm/nvm.sh nvm use v0.3.3 -----
