For updating a previous version of an iso you can use zsync, run the command from the same directory as your existing iso. zsync uses a control file to determine whether any blocks in the file are already known to the downloader, and only downloads the new blocks. | For updating a previous version of an iso you can use zsync, run the command from the same directory as your existing iso. zsync uses a control file to determine whether any blocks in the file are already known to the downloader, and only downloads the new blocks. |