Part two of my hands on tutorial series on Ethereum. In the first video we installed Geth – in this one we actually get our hands dirty and start using it. We are just creating a private local ethereal network – with two nodes – I show how to initialise a new blockchain from a sample genesis block, how to start the javascript console and some basic commands to get you started. I start a miner, show the block height increasing and that the blockchain is being communicated across both separate nodes. This is intended to be a very hands on tutorial so please follow along. ______________________________________________________________ Here is the script from the session. NOTE angle brackets i.e. the GREATER THAN SYMBOL are not allowed in the description so I’ve replaced with &gt – you need to replace with the GREATER THAN symbol when running the command 0. Set up the environment cd ~ mkdir ethereum echo ‘export ethereum_home=/Users/mattthomas/ethereum’ (double right arrow) ~/.bash_profile ~/.bash_profile cd ethereum vi $ethereum_home/genesis.json (pasre this with cmd v in edit mode) { “nonce”: “0x0000000000000042”, “timestamp”: “0x0”, “parentHash”: “0x0000000000000000000000000000000000000000000000000000000000000000”, “extraData”: “0x0”, “gasLimit”: “0x8000000”, “difficulty”: “0x400”, “mixhash”: “0x0000000000000000000000000000000000000000000000000000000000000000”, “coinbase”: “0x3333333333333333333333333333333333333333”, “alloc”: { } } Save with esc !wq 1. initialise the block geth –datadir “$ethereum_home/youtube1” init “$ethereum_home/genesis.json” 2. start the console geth –datadir “$ethereum_home/chain5” console 2 &gt console.log 3.create a 2nd node geth –datadir “$ethereum_home/youtube1-a” init “$ethereum_home/genesis.json” 4. Start on a different port and specify networkid geth –datadir “$ethereum_home/youtube1-a” –port 30304 –nodiscover –networkid 1234 console 2 &gt [More]