Mining in private net Balance not increasing

Question

I am running the following command:

$ geth --datadir ~/private_net --port 7545 --networkid 1111 console 2>>node.log

$ eth.miner()

but balance does not increase.

$ eth.getBalance(eth.accounts[0])

genesis.json

{
  "config": {
        "chainId": 10,
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },
  "alloc"      : {},
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x20000",
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",
  "nonce"      : "0x0000000000000042",
  "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00"
}

Answer 1

Use this command to start miner:

miner.start()

To stop the miner:

miner.stop()

You can even specify the number of CPU threads with:

miner.start(7)