Website at https://pypi.org/project/duplicity-backup-s3/.

Run the following commands to install:

sudo apt install duplicity
sudo apt install python3-pip
sudo python3 -m pip install duplicity-backup-s3
pip3 install boto

Export the credentials you were given to the shell environment:

export AWS_ACCESS_KEY_ID=<your_access_key>
export AWS_SECRET_ACCESS_KEY=<your_secret_access_key>

Run the following command to perform a backup:

duplicity <path_to_backup> s3://polycloud.crowdapis.com/<your_bucket>