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Here is my genesis.json file, BTW I had lowered the difficulty to 0x000010 { "config": { "chainId": 5493, "homesteadBlock": 1, "eip150Block": 2, "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000", "eip155Block": 3, "eip158Block": 3, "byzantiumBlock": 4, "ethash": {} }, "nonce": "0x0", "timestamp": "0x5a9d2b4e", "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000", "gasLimit": "0x47b760", "difficulty": "0x000010", "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000", "coinbase": "0x0000000000000000000000000000000000000000", "alloc": { "0000000000000000000000000000000000000000": { "balance": "0x1" } }, "number": "0x0", "gasUsed": "0x0", "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000" }

The commands to launch the various nodes are

bootnode file="/root/bootnode/enode" if [ ! -f "$file" ] then echo "initialize bootnode" bootnode -genkey /root/bootnode/nodekeyfile fi bootnode -nodekey /root/bootnode/nodekeyfile

geth node geth --networkid 5493 --bootnodes "$(echo -n 'enode://'; bootnode --writeaddress -nodekey /root/bootnode/nodekeyfile | tr -d '\n'; echo '@192.168.2.2:30301')" --mine --rpc --rpcport "8545" --port "30303" --rpccorsdomain "*" --nat "any" --rpcapi eth,web3,personal,net --etherbase 0 --unlock "$(cat /root/.ethereum/geth/security/coinbase)" --password /root/.ethereum/geth/security/password.sec

Here is my genesis.json file, BTW I had lowered the difficulty to 0x000010

{ "config": { "chainId": 5493, "homesteadBlock": 1, "eip150Block": 2, "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000", "eip155Block": 3, "eip158Block": 3, "byzantiumBlock": 4, "ethash": {} }, "nonce": "0x0", "timestamp": "0x5a9d2b4e", "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000", "gasLimit": "0x47b760", "difficulty": "0x000010", "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000", "coinbase": "0x0000000000000000000000000000000000000000", "alloc": { "0000000000000000000000000000000000000000": { "balance": "0x1" } }, "number": "0x0", "gasUsed": "0x0", "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000" } 

The commands to launch the various nodes are

bootnode file="/root/bootnode/enode" if [ ! -f "$file" ] then echo "initialize bootnode" bootnode -genkey /root/bootnode/nodekeyfile fi bootnode -nodekey /root/bootnode/nodekeyfile geth node geth --networkid 5493 --bootnodes "$(echo -n 'enode://'; bootnode --writeaddress -nodekey /root/bootnode/nodekeyfile | tr -d '\n'; echo '@192.168.2.2:30301')" --mine --rpc --rpcport "8545" --port "30303" --rpccorsdomain "*" --nat "any" --rpcapi eth,web3,personal,net --etherbase 0 --unlock "$(cat /root/.ethereum/geth/security/coinbase)" --password /root/.ethereum/geth/security/password.sec