how do i know that my fydeos iso are completed and not incorrupted or non-functional feature
On the Download page of the image you downloaded, there is a line in the file details that says “sha256-sum,” and gives a long string of characters which is the file’s hash. When your download is complete, you must run a hash on the file you downloaded of the same algorithm type(in this case, sha256) and then see that the hash you generated matches the long string of characters supplied by the “sha256-sum” line on the download page. In Linux, you’d generate the hash with the command
$ sha256sum /path/to/downloaded/fydeOS.img.xz
If you use Windows, you’d open a cmd prompt or powershell window and run
> certUtil -hashfile C:\path\to\fydeOS.img.xz sha256
If the hash generated matches the string on the web page,
then proceed and extract the archive.
If it does not, delete the file and download it again before performing the same check again. Repeat the process until you get a match.