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zsync

zsync is a file transfer program. It allows you to download a file from a remote server, where you have a copy of an older version of the file on your computer already. zsync downloads only the new parts of the file. It uses the same algorithm as rsync.

Cost / License

  • Free
  • Open Source

Platforms

  • Linux
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Backup & Sync, OS & Utilities
zsync was added to AlternativeTo by RemovedUser on and this page was last updated .

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Install from the command line

  • brew install zsync

Be careful what you paste into a terminal. Check what a command installs before running it.

What is zsync?

zsync is a file transfer program. It allows you to download a file from a remote server, where you have a copy of an older version of the file on your computer already. zsync downloads only the new parts of the file. It uses the same algorithm as rsync. However, where rsync is designed for synchronising data from one computer to another within an organisation, zsync is designed for file distribution, with one file on a server to be distributed to thousands of downloaders. zsync requires no special server software — just a web server to host the files — and imposes no extra load on the server, making it ideal for large scale file distribution.

zsync is open source, distributed under version 2 of the Artistic License.