You should see the version number and a list of available commands:
Usage: decibel-cli [options] [command]Command-line interface for trading on Decibel DEXOptions: -V, --version output the version number --network <network> Network to use (mainnet, testnet, local) -h, --help display help for commandCommands: account Manage trading accounts markets View market information trade Trading commands help [command] display help for command