I have been going through the Cardano developer tutorials and they asked me to run this code (posted below) to run a node but it responded with (Failed to parse IPv4 address: x.x.x.x.). I figured that it's because I didn't use a valid address (line 5) how do I get one?
cardano-node run
--topology path/to/mainnet-topology.json
--database-path path/to/db
--socket-path path/to/db/node.socket
--host-addr x.x.x.x
--port 3001
--config path/to/mainnet-config.json