Bitcoin Core quick install guide

Install and run:

wget https://bitcoin.org/bin/bitcoin-core-0.15.0.1/bitcoin-0.15.0.1-x86_64-linux-gnu.tar.gz
tar -xvf  bitcoin-0.15.0.1-x86_64-linux-gnu.tar.gz 
cd bitcoin-0.15.0/
mkdir datadir
./bin/bitcoind -port=8444 -rpcport=8442 -datadir=./datadir  -rpcuser=user  -rpcpassword=pass -rpcbind=0.0.0.0  -rpcallowip=44.33.22.11
# dont forget to put your own allowip, username, pass

Wait till it syncs (might take a while).

Run

./bin/bitcoin-cli -rpcclienttimeout=30  -rpcport=8442  -rpcuser=user -rpcpassword=pass     getblockchaininfo

to check it. If it hangs - blockchain is busy syncing, check out debug.log in datadir for details.