generate nblocks ( maxtries )

The generate RPC nearly instantly generates blocks.

*bitcoin-cli help generate

generate nblocks ( maxtries )

Mine up to nblocks blocks immediately (before the RPC call returns) to an address in the wallet.

Arguments:
1. nblocks      (numeric, required) How many blocks are generated immediately.
2. maxtries     (numeric, optional) How many iterations to try (default = 1000000).

Result:
[ blockhashes ]     (array) hashes of blocks generated

Examples:

Generate 11 blocks
> bitcoin-cli generate 11