Started with peering and re-organized files.

contrib/aws-network-operation.asciidoc

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+[[_anchor_operate_private_network]]
+== Operating a private Ethereum network
+
+[[_anchor_start_nodes]]
+==== Start nodes
+
+1. Log onto first machine and start Ethereum with the command below.
+
+[[_code_start_node_nodiscover]]
+[source,bash]
+----
+geth --datadir "/home/ubuntu/eth-priv" --networkid 15 --nodiscover --maxpeers 2  --port 30333 console
+----
+
+2. Log onto second machine and start Ethereum with the command below.
+
+[[_code_start_node]]
+[source,bash]
+----
+geth --datadir "/home/ubuntu/eth-priv" --networkid 15 --port 30333 console
+----
+
+3. Check for connected peer with the command below.
+
+[[_code_node_list]]
+[source,bash]
+----
+admin.peers
+----
+
+4. Exit with `Ctrl-D` on the third machine.
+
+[[_anchor_account_setup]]
+==== Set-up accounts
+
+For now, we will set-up accounts only on the third machine. First, we launch the console as shown below.
+
+[[_code_console_launch]]
+[source,bash]
+----
+geth --datadir "/home/ubuntu/eth-priv" --networkid 15 console
+----
+
+Then, we add an account as below.
+
+[[_code_add_account]]
+[source,bash]
+----
+geth --datadir "/home/ubuntu/eth-priv" account new
+----
+
+Finally, we start the mining process so that ethers are credited to this account.
+
+[[_code_start_mining]]
+[source,bash]
+----
+geth --datadir "/home/ubuntu/eth-priv" --networkid 15 --mine
+----
+
+We can check the balance using the following command on the console.
+
+[[_code_account_balance]]
+[source,bash]
+----
+eth.getBalance(eth.accounts[0])
+----
+
+[[_anchor_RPC]]
+==== Start RPC
+
+On the third machine, open up the RPC port to allow for communication with a client.
+
+[[_code_start_rpc]]
+[source,bash]
+----
+geth --datadir eth-priv --networkid 15 --maxpeers 2 --port 30333 --rpc --rpcapi "web3,eth,personal" --rpcaddr "0.0.0.0" --rpccorsdomain "*"
+----
+
+**NOTE** that, the `--rpcaddr 0.0.0.0` value has been set for testing only. This value is **strongly discouraged**.
+
+[[_anchor_mining]]
+=== Mining
+
+[[_code_start_mining_rpc]]
+[source,bash]
+----
+geth --datadir eth-priv --networkid 15 --maxpeers 3 --port 30333 --rpc --rpcapi "web3,eth,personal" --rpcaddr "0.0.0.0" --rpccorsdomain "*" --mine
+----
+
+[[_anchor_RPC_end-point]]
+=== RPC End-point
+
+=== Contract deployment and execution
+
+==== Deployment
+
+==== Execution