You can maintain a bash script like
./hydra/result/bin/hydra-node \
--hydra-signing-key dan-hydra.sk \
--node-id Dan \
--port 5005 \
--api-host 0.0.0.0 \
--host 0.0.0.0 \
--cardano-signing-key dan-node.sk \
--ledger-protocol-parameters data/protocol-parameters.json \
--testnet-magic 2 \
--node-socket mainnet/node.sock \
--persistence-dir ~/mainnet/persistence \
--hydra-scripts-tx-id $(cat data/hydra-scripts-tx-id) \
--start-chain-from $(cat data/start-chain-from) \
--peer $(cat data/parties/arnaud.peer) \
--hydra-verification-key data/parties/arnaud.hydra.vk \
--cardano-verification-key data/parties/arnaud.cardano.vk \
--peer $(cat data/parties/franco.peer) \
--hydra-verification-key data/parties/franco.hydra.vk \
--cardano-verification-key data/parties/franco.cardano.vk \
--peer $(cat data/parties/sasha.peer) \
--hydra-verification-key data/parties/sasha.hydra.vk \
--cardano-verification-key data/parties/sasha.cardano.vk \
--peer $(cat data/parties/sebastian.peer) \
--hydra-verification-key data/parties/sebastian.hydra.vk \
--cardano-verification-key data/parties/sebastian.cardano.vk \
--contestation-period 300s \
| tee -i hydra.log