Live KES period

slotsPerKESPeriod: 129600
slot: 27553005
> expr 27553005 / 129600
212
cardano-cli shelley node issue-op-cert \
--kes-verification-key-file kes.vkey \
--cold-signing-key-file cold.skey \
--operational-certificate-issue-counter cold.counter \
--kes-period 212 \
--out-file node.cert