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Duplicacy Command Line Version 3.2.5, released by developer gilbertchen, is a cross-platform, lock-free deduplication cloud backup utility that enables incremental, encrypted, and bandwidth-efficient protection of files and folders to more than twenty storage back-ends, including Amazon S3, Backblaze B2, Google Cloud Storage, Microsoft Azure, Dropbox, Google Drive, OneDrive, and generic SFTP/WebDAV servers. Written in Go and distributed as a single executable for Windows, macOS, Linux, and FreeBSD, the program divides source data into variable-size chunks, hashes each chunk, and uploads only unique segments, eliminating redundant data both locally and across multiple repositories while avoiding the traditional locking mechanisms that can corrupt backups when several clients write simultaneously. This architecture makes the tool suitable for personal archives, multi-machine households, small-business disaster-recovery plans, and DevOps pipelines that need versioned, off-site artifacts without multiplying storage costs. Admins schedule hourly or daily jobs through cron, Task Scheduler, or CI scripts, set retention policies with configurable pruning, and restore any revision by pointing the CLI to the exact snapshot ID; because chunk indexes are plain JSON files stored alongside data, recovery can also be performed with nothing more than the open-source binary and credentials. The four published editions—1.x through the current 3.x branch—have progressively added RSA-based secure key management, pre-backup executable hooks, configurable rate limiting, and concurrent upload threads, all controlled through straightforward init, backup, list, check, copy, and prune sub-commands. Duplicacy Command Line Version is available at no cost on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always supplying the newest build and supporting batch installation of multiple applications.
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