Timeshift

With a secure, scalable architecture, Kopia can back up everything from small laptops to large servers today. Kopia is a fast and secure open-source backup/restore tool that manages filesystem snapshots in a remote storage. Kopia uploads directories and files to remote storage called Repository and maintains a set of historical point-in-time snapshot records based on defined policies. Each snapshot is always incremental, no data included in previous snapshots is ever re-uploaded to the repository based on file content. After moving or renaming even large files, Kopia can recognize that they have the same content and won’t need to upload them again. Multiple users or computers can share same repository: if users share the same files, they are also uploaded only once. To restore data, Kopia can mount the contents of a Repository as a local disk, and you can use normal file copy tools to perform full or selective restore.

rsnapshot makes it easy to make periodic snapshots of local machines, and remote machines over ssh. The code makes extensive use of hard links whenever possible, to greatly reduce the disk space required. Depending on your configuration, it is quite possible to set up in just a few minutes. Files can be restored by the users who own them, without the root user getting involved. There are no tapes to change, so once it’s set up, your backups can happen automatically untouched by human hands. And because rsnapshot only keeps a fixed (but configurable) number of snapshots, the amount of disk space used will not continuously grow. It is written entirely in perl with no module dependencies and has been tested with versions 5.004 through 5.16.3. It should work on any reasonably modern UNIX compatible OS.