Using Debian alternative system to switch between versions of Node.js

gistfile1.txt

To switch easily between Node versions on Debian, instead of tools like [nvm](https://github.com/creationix/nvm), you can just use [Debian's native alternatives system](http://www.debian-administration.org/article/91/Using_the_Debian_alternatives_system).

(the following commands require root privilege)
 - download and install the node executables under /usr/local/bin/nodes/…
 - add this binaries to the alternative system:
    update-alternatives --install /usr/bin/node node /usr/bin/nodejs 100
    update-alternatives --install /usr/bin/node node /usr/local/bin/nodes/0.10.38/nodejs 50
 - to switch between versions, just call `update-alternatives --config node`