1.1. help

$  etcdctl  lease keep-alive --help
NAME:
        lease keep-alive - Keeps leases alive (renew)

USAGE:
        etcdctl lease keep-alive [options] <leaseID> [flags]

OPTIONS:
  -h, --help[=false]    help for keep-alive
      --once[=false]    Resets the keep-alive time to its original value and exits immediately