Short answer:
Duplicacy CLI is the command-line engine behind its graphical interfaces and can be invoked from scripts. The developer says CLI backups are free for personal use; commercial backup operations require an appropriate license.
Before choosing a CLI workflow
- Confirm whether the use is personal or commercial and read the current license terms.
- Download the CLI from the developer-linked repository and verify the binary.
- Document the source, storage and chosen Backup ID before automating anything.
- Test restoration interactively before relying on unattended scripts.
Why this site does not invent commands
CLI flags vary by version and operation. Use the version-matched official CLI documentation rather than copying unverified example commands from unrelated software.