# Install Bitcoin Core

## Get PPA

```
sudo add-apt-repository ppa:bitcoin/bitcoin
// PRESS ENTER TO CONTINUE
sudo apt update && sudo apt install bitcoind
// PRESS Y TO CONTINUE
```

## Setup Dirs

```
mkdir /blockchain/.bitcoin && mkdir /blockchain/.bitcoin/data && mkdir ~/.bitcoin
```

Edit bitcoin.conf

```
emacs ~/.bitcoin/bitcoin.conf

addnode= // add nodes, each on a new line
assumevalid= // plug in the current best block hash
daemon=1
datadir=/blockchain/.bitcoin/data
dbcache=3000 // MB of RAM to use, don't set to more than like 50% of the available memory
disablewallet=1
listen=0
maxmempool=100 // Set higher if there is available memory
maxuploadtarget=1000
nopeerbloomfilters=1
peerbloomfilters=0
permitbaremultisig=0
rpcpassword= // make a strong password
rpcuser=bitcoinrpc
server=1
testnet=1 // Set as applicable
zmqpubrawblock=tcp://127.0.0.1:28332
zmqpubrawtx=tcp://127.0.0.1:28333
```

## Tor Config

```
sudo emacs /etc/tor/torrc

ControlPort 9051
CookieAuthentication 1
CookieAuthFileGroupReadable 1

sudo service tor restart
```

Adjust addnode as necessary. Below are mainnet onion peers.

```
emacs ~/.bitcoin/bitcoin.conf

addnode=gyn2vguc35viks2b.onion
addnode=kvd44sw7skb5folw.onion
addnode=nkf5e6b7pl4jfd4a.onion
addnode=yu7sezmixhmyljn4.onion
addnode=3ffk7iumtx3cegbi.onion
addnode=3nmbbakinewlgdln.onion
addnode=4j77gihpokxu2kj4.onion
addnode=546esc6botbjfbxb.onion
addnode=5at7sq5nm76xijkd.onion
addnode=77mx2jsxaoyesz2p.onion
addnode=7g7j54btiaxhtsiy.onion
addnode=a6obdgzn67l7exu3.onion
addnode=ab64h7olpl7qpxci.onion
addnode=am2a4rahltfuxz6l.onion
addnode=azuxls4ihrr2mep7.onion
addnode=bitcoin7bi4op7wb.onion
addnode=bitcoinostk4e4re.onion
addnode=bk7yp6epnmcllq72.onion
addnode=bmutjfrj5btseddb.onion
addnode=ceeji4qpfs3ms3zc.onion
addnode=clexmzqio7yhdao4.onion
addnode=gb5ypqt63du3wfhn.onion
addnode=h2vlpudzphzqxutd.onion

onlynet=onion
proxy=127.0.0.1:9050
```

## Start Bitcoin Core

```
bitcoind
```

## Create Symlink to Logs

```
// If on mainnet:
ln -s /blockchain/.bitcoin/data/debug.log ~/bitcoind-mainnet.log

// If on testnet:
ln -s /blockchain/.bitcoin/data/testnet3/debug.log ~/bitcoind-testnet.log
```