curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh

 % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--    100 15916  100 15916    0     0  47060      0 --:--:-- --:--:-- --:--:-- 47088
=> Downloading nvm from git to '/root/.nvm'
=> Cloning into '/root/.nvm'...
remote: Enumerating objects: 360, done.
remote: Counting objects: 100% (360/360), done.
remote: Compressing objects: 100% (306/306), done.
remote: Total 360 (delta 40), reused 170 (delta 28), pack-reused 0
Receiving objects: 100% (360/360), 219.85 KiB | 1.76 MiB/s, done.
Resolving deltas: 100% (40/40), done.
* (HEAD detached at FETCH_HEAD)
  master
=> Compressing and cleaning up git repository

=> Appending nvm source string to /root/.bashrc
=> Appending bash_completion source string to /root/.bashrc
=> You currently have modules installed globally with `npm`. These will no
=> longer be linked to the active version of Node when you install a new node
=> with `nvm`; and they may (depending on how you construct your `$PATH`)
=> override the binaries of modules installed with `nvm`:

/usr/local/lib
└── [email protected]
=> If you wish to uninstall them at a later point (or re-install them under your
=> `nvm` Nodes), you can remove them from the system Node as follows:

     $ nvm use system
     $ npm uninstall -g a_module

=> Close and reopen your terminal to start using nvm or run the following to use it now:

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

nvm: nvm [ install | use | run | ls | ls-remote | alias ], .nvmrc, node --version, nvm alias default, brew install nvm, --help ]