(If you are worried that the win or linux system you downloaded is not the original system, it has been tampered with or put a virus Trojan horse, you can use this software to find the md5 value of the image iso file, check if the md5 value is the same, and add a safe line. The software is used under win system, if you check md5 value under linux, you can use the command md5sumfilename to check.)
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