Download Ethereum

• mkdir /home/gi.gupta/projects/ethereum
• cd /home/gi.gupta/projects/ethereum
• sudo apt-get install software-properties-common
• sudo add-apt-repository -y ppa:ethereum/ethereum
• sudo apt-get update
• sudo apt-get install ethereum

create new account in

• create new account for private network at /home/gi.gupta/projects/ethereum

• geth --datadir myPrivateNetwork2 account new

• logs:

WARN [06-23|17:59:30] No etherbase set and no accounts found as default

Your new account is locked with a password. Please give a password.

Do not forget this password.

Passphrase:

Repeat passphrase:

Address: {ef0e5806e9242cb41611267a6f1cdb95ea4a313e}

create genesis json file(customGenesis.json)

{
	"nonce": "0x0000000000000042",
	"timestamp": "0x0",
	"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
	"extraData": "0x00",
	"gasLimit": "0x8000000",
	"difficulty": "0x400",
	"mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
	"coinbase": "0x3333333333333333333333333333333333333333",
	"config": {
	    "chainId": 15,
	    "homesteadBlock": 0,
	    "eip155Block": 0,
	    "eip158Block": 0
    },
	"alloc":{}
}

geth init

geth --identity "Girish" --fast --cache=1024 --rpc --rpcport "8013" --rpccorsdomain "*" --datadir "myPrivateNetwork2" --port "30312" --rpcapi "db,eth,net,web3,admin,debug,miner,personal,web3" --networkid 1902 --nat "any" init customGenesis.json console

• logs

INFO [06-23|18:01:42] Allocated cache and file handles database=/home/gi.gupta/projects/ethereum/myPrivateNetwork2/geth/chaindata cache=16 handles=16 INFO [06-23|18:01:42] Writing custom genesis block INFO [06-23|18:01:42] Successfully wrote genesis state database=chaindata hash=6650a0…b5c158 INFO [06-23|18:01:42] Allocated cache and file handles database=/home/gi.gupta/projects/ethereum/myPrivateNetwork2/geth/lightchaindata cache=16 handles=16 INFO [06-23|18:01:42] Writing custom genesis block INFO [06-23|18:01:42] Successfully wrote genesis state database=lightchaindata hash=6650a0…b5c158

start block chain

geth --identity "Girish" --fast --cache=1024 --rpc --rpcport "8013" --rpccorsdomain "*" --datadir "myPrivateNetwork2" --port "30312" --rpcapi "db,eth,net,web3,admin,debug,miner,personal,web3" --networkid 1902 --nat "any" -ipcpath "/home/gi.gupta/.ethereum/geth.ipc" console

logs:

INFO [06-23|18:09:06] Starting peer-to-peer node instance=Geth/Prashant/v1.6.6-stable-10a45cb5/linux-amd64/go1.8.1 INFO [06-23|18:09:06] Allocated cache and file handles database=/home/gi.gupta/projects/ethereum/myPrivateNetwork2/geth/chaindata cache=1024 handles=1024 INFO [06-23|18:09:06] Initialised chain configuration config="{ChainID: 15 Homestead: 0 DAO: DAOSupport: false EIP150: EIP155: 0 EIP158: 0 Metropolis: Engine: unknown}" INFO [06-23|18:09:06] Disk storage enabled for ethash caches dir=/home/gi.gupta/projects/ethereum/myPrivateNetwork2/geth/ethash count=3 INFO [06-23|18:09:06] Disk storage enabled for ethash DAGs dir=/home/gi.gupta/.ethash count=2 INFO [06-23|18:09:06] Initialising Ethereum protocol versions="[63 62]" network=1902 INFO [06-23|18:09:06] Loaded most recent local header number=0 hash=6650a0…b5c158 td=1024 INFO [06-23|18:09:06] Loaded most recent local full block number=0 hash=6650a0…b5c158 td=1024 INFO [06-23|18:09:06] Loaded most recent local fast block number=0 hash=6650a0…b5c158 td=1024 INFO [06-23|18:09:06] Starting P2P networking INFO [06-23|18:09:08] UDP listener up self=enode://7d7fb16fceaab128fd46804ac446d4236c2c53e29430e68a04273cdb9deff8c78e5f5b4ec6d5505c31424ac7cc6d3d3febd803704bcfe7f48775301efb72442f@[::]:30312 INFO [06-23|18:09:08] RLPx listener up self=enode://7d7fb16fceaab128fd46804ac446d4236c2c53e29430e68a04273cdb9deff8c78e5f5b4ec6d5505c31424ac7cc6d3d3febd803704bcfe7f48775301efb72442f@[::]:30312 INFO [06-23|18:09:08] IPC endpoint opened: /home/gi.gupta/.ethereum/geth.ipc INFO [06-23|18:09:08] HTTP endpoint opened: http://127.0.0.1:8013 Welcome to the Geth JavaScript console!

instance: Geth/Prashant/v1.6.6-stable-10a45cb5/linux-amd64/go1.8.1 coinbase: 0xef0e5806e9242cb41611267a6f1cdb95ea4a313e at block: 0 (Thu, 01 Jan 1970 05:30:00 IST) datadir: /home/gi.gupta/projects/ethereum/myPrivateNetwork2 modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0

start mining

• geth attach

miner.start(4) null eth.accounts ["0xef0e5806e9242cb41611267a6f1cdb95ea4a313e"] eth.getBalance("0xef0e5806e9242cb41611267a6f1cdb95ea4a313e") 160000000000000000000 eth.getBalance("0xef0e5806e9242cb41611267a6f1cdb95ea4a313e") 270000000000000000000 eth.getBalance("0xef0e5806e9242cb41611267a6f1cdb95ea4a313e") 275000000000000000000

downlaod etherium wallet to mange accoubt through GUI

Download https://github.com/ethereum/mist/releases