Linux Shell Scripting Cookbook - Third Edition

Continuing and resuming downloads

cURL can resume a download from a given offset. This is useful if you have a per-day data limit and a large file to download.

$ curl URL/file -C offset

offset is an integer value in bytes.

cURL doesn't require us to know the exact byte offset, if we want to resume downloading a file. If you want cURL to figure out the correct resume point, use the -C - option, as follows:

$ curl -C - URL

cURL will automatically figure out where to restart the download of the specified file.