tldr/pages/linux/zsync.md

zsync

Partial/differential file downloader. HTTPS is not supported - use HTTP URLs only. See also: rsync. More information: https://manned.org/zsync.

• Download a file using a .zsync control file:

zsync {{path/to/url.zsync}}

• Use a local file as a seed to avoid re-downloading unchanged parts:

zsync -i {{path/to/existing_file}} {{path/to/url.zsync}}

• Save the updated file under a specific name:

zsync -i {{path/to/existing_file}} -o {{path/to/new_file}} {{path/to/url.zsync}}

• Resume a partial download and keep the temporary file:

zsync -k {{path/to/url.zsync}}

• Run in quiet mode with minimal output (no progress bar, download rate, or ETA display):

zsync -q {{path/to/url.zsync}}