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BackupPC is an open-source, high-performance backup and recovery software. The solution uses a web-based interface and the Rsync protocol to back up Linux, Windows, and macOS machines to a server's disk. BackupPC features include support for hardlinking in incremental backups to save space on the server, pooling of identical files from different computers for efficient storage utilization through hardlinks or rsync deduplication techniques, archive management with automatic expiration settings. It also has sophisticated full system recovery options without requiring client-side software installation due to its use of standard protocols like SSH or Samba. BackupPC offers users customizable configuration settings such as compression levels and per-user blacklists/whitelists for fine-tuning backup operations tailored specifically to their needs while ensuring data security through encryption options available during transmission over networks by leveraging OpenSSH technology.