Mastering Bitcoin

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Mastering Bitcoin ( mastering-bitcoin )

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/bin/mkdir -p '/usr/local/bin' /usr/bin/install -c bitcoind bitcoin-cli '/usr/local/bin' Making install in test make install-am /bin/mkdir -p '/usr/local/bin' /usr/bin/install -c test_bitcoin '/usr/local/bin' $ We can confirm that bitcoin is correctly installed, by asking the system for the path of the two executables, as follows: $ which bitcoind /usr/local/bin/bitcoind $ which bitcoin-cli /usr/local/bin/bitcoin-cli The default installation of bitcoind puts it in /usr/local/bin. When we first run bit‐ coind it will remind us to create a configuration file with a strong password for the JSON-RPC interface. We run it by typing bitcoind into the terminal: $ bitcoind Error: To use the "-server" option, you must set a rpcpassword in the configuration file: /home/ubuntu/.bitcoin/bitcoin.conf It is recommended you use the following random password: rpcuser=bitcoinrpc rpcpassword=2XA4DuKNCbtZXsBQRRNDEwEY2nM6M4H9Tx5dFjoAVVbK (you do not need to remember this password) The username and password MUST NOT be the same. If the file does not exist, create it with owner-readable-only file permissions. It is also recommended to set alertnotify so you are notified of problems; for example: alertnotify=echo %s | mail -s "Bitcoin Alert" admin@foo.com Edit the configuration file in your preferred editor and set the parameters, replacing the password with a strong password as recommended by bitcoind. Do not use the password shown below. Create a file inside the .bitcoin directory so that it is named .bitcoin/ bitcoin.conf and enter a username and password: rpcuser=bitcoinrpc rpcpassword=2XA4DuKNCbtZXsBQRRNDEwEY2nM6M4H9Tx5dFjoAVVbK While you’re editing this configuration file, you may want to set a few other options, such as txindex (See “Transaction database index and txindex option” on page 48). For a full listing of the available options type bitcoind --help. Now, run the Bitcoin Core client. The first time you run it, it will rebuild the bitcoin blockchain by downloading all the blocks. This is a multi-gigabyte file and will take on average 2 days to download in full. You can shorten the blockchain initialization time by downloading a partial copy of the blockchain using a bittorrent client from http:// sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/. 38 | Chapter 3: The Bitcoin Client

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