sudo gem update --system安裝 nvm (node.js)
git clone git://github.com/creationix/nvm.git ~/.nvm ### You can also add this line to ~/.bashrc or ~/.zshrc if you are using zsh source ~/.nvm nvm sync ### Install latest version, you can also specific the version you want nvm install latest ### check all versions you installed nvm ls ### if you need it every time, set it as default nvm alias default 0.10.20
