Package: s3ql

"s3ql" package binaries on Debian:

/usr/bin/expire_backups /usr/bin/fsck.s3ql /usr/bin/mkfs.s3ql /usr/bin/mount.s3ql /usr/bin/parallel-cp /usr/bin/s3qladm /usr/bin/s3qlcp /usr/bin/s3qlctrl /usr/bin/s3qllock /usr/bin/s3ql_oauth_client /usr/bin/s3qlrm /usr/bin/s3qlstat /usr/bin/s3ql_verify /usr/bin/umount.s3ql

You may install this package on Debian with apt-get install s3ql