generate nblocks ( maxtries )
Mine up to nblocks blocks immediately (before the RPC call returns) to an address in the wallet.
1. nblocks (numeric, required) How many blocks are generated immediately.
2. maxtries (numeric, optional) How many iterations to try (default = 1000000).
[ blockhashes ] (array) hashes of blocks generated
Generate 11 blocks
> bitcoin-cli generate 11