geth --fdlimit

 --fdlimit value                     (default: 0)                       ($GETH_FDLIMIT)
         Raise the open file descriptor resource limit (default = system fd limit)

geth [ account | console | --authrpc.addr | version | --sepolia | --goerli | --pprof | --http | --syncmode | --mine ] --rpc.evmtimeout | --ethstats | --help, Geth logs, geth logs WARN, Log.Error, ports: 8551, 30303, 8547, ~/.ethereum/geth/, --verbosity, --config, geth init