# croc > Send and receive files easily and securely over any network. > More information: . - Send a file or folder: `croc send {{path/to/file}}` - Send a file or folder with a specific passphrase: `croc send --code {{passphrase}} {{path/to/file}}` - Receive a file or folder on receiving machine: `croc {{passphrase}}` - Send and connect over a custom relay: `croc --relay {{ip_to_relay}} send {{path/to/file}}` - Receive and connect over a custom relay: `croc --relay {{ip_to_relay}} {{passphrase}}` - Host a croc relay on the default ports: `croc relay` - Display parameters and options for a croc command: `croc {{send|relay}} --help`