Usage: cardano-cli query kes-period-info 
            [ --shelley-mode
            | --byron-mode [--epoch-slots NATURAL]
            | --cardano-mode [--epoch-slots NATURAL]
            ]
            (--mainnet | --testnet-magic NATURAL)
            --op-cert-file FILE
            [--out-file FILE]

  Get information about the current KES period and your node's operational
  certificate.

Available options:
  --shelley-mode           For talking to a node running in Shelley-only mode.
  --byron-mode             For talking to a node running in Byron-only mode.
  --epoch-slots NATURAL    The number of slots per epoch for the Byron era.
                           (default: 21600)
  --cardano-mode           For talking to a node running in full Cardano mode
                           (default).
  --epoch-slots NATURAL    The number of slots per epoch for the Byron era.
                           (default: 21600)
  --mainnet                Use the mainnet magic id.
  --testnet-magic NATURAL  Specify a testnet magic id.
  --op-cert-file FILE      Filepath of the node's operational certificate.
  --out-file FILE          Optional output file. Default is to write to stdout.
  -h,--help                Show this help text