how to install node on raspberry pi 2?
thanks
It'll be the very similar to any other guides for cryptocurrency wallets on the Rpi or similar to Linux in general like Ubuntu for example. You'll also need some dependencies so just install this lot as well. You don't actually need them all but these dependencies bring other dependencies to be installed that you do actually need.
apt-get update && apt-get upgrade
apt-get install ntp git build-essential libssl-dev libdb-dev libdb++-dev libboost-all-dev libqrencode-dev
Plus those dependencies will help you build cryptocurrencies from source on Github that's what they're actually for. Although I can't get FairCoin to run on Linux without them. And a Rpi is a flavour of Debian Linux just like Ubuntu is. So if you ever can't find a Rpi guide for what you want to do. Have a look for Debian and Ubuntu guides for the same problem which may do the trick.