Verify and resume a download

Save the ISO and its .sha256 file in the same directory. On Linux run sha256sum -c NAME.iso.sha256. With the shasum utility, use shasum -a 256 -c NAME.iso.sha256. Look for OK.

To resume an interrupted download, copy the original download link and run curl -f -C - -O "URL" in the directory containing the partial file.

Match the version and architecture. Resume using the original URL, which identifies a specific file by its contents.