1. 准备创始文件（init.json）
   大概是这样：

{
"config": {
"chainId": 1234,
"homesteadBlock": 0,
"eip150Block": 0,
"eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"eip155Block": 0,
"eip158Block": 0,
"byzantiumBlock": 0,
"constantinopleBlock": 0,
"petersburgBlock": 0,
"ethash": {}
},
"nonce": "0x0",
"timestamp": "0x5dcba32c",
"extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
"gasLimit": "0x97b760",
"difficulty": "0x200000",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"coinbase": "0x0000000000000000000000000000000000000000",
"alloc": {
"你的初始账号 1": {
"balance": "0x200000000000000000"
},
"你的初始账号 2": {
"balance": "0x200000000000000000"
},
"你的初始账号 3: {
"balance": "0x200000000000000000"
}
},
"number": "0x0",
"gasUsed": "0x0",
"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
}

2. 初始化世纪块

geth --datadir data init init.json

3. 启动节点，开始挖矿

geth --datadir data --networkid 1234 --unlock '挖矿账号' --password 'pwd.txt' --rpc --mine --allow-insecure-unlock console

这时候，找到enode， 以供其他节点链接：

enode://xxx@peerIP:30303

使用：

miner.start() 开启挖矿

4. 其他节点加入

geth --datadir data --syncmode 'full' --networkid 1234 --bootnodes 'enode:// xxxx@ip:30303'
--unlock '挖矿账号2' --password 'pwd.txt' --mine

这样就搭建好了两个节点，其他的节点同理。