![]() Recurring verifications make any such tampering quickly discoverable, and the existence of the new procedures discourage hackers from even trying. It is difficult to do this kind of "undetectable" tampering even to files without these safeguards. So some of the distros have instituted somewhat convoluted procedures that enable you to have good assurance that the checksum you compare the iso to hasn't been tampered with. However, it's possible for the iso to be tampered with, and the checksum file to also be tampered with. Until recently, distros just provided the checksum so you could verify that you downloaded a good iso. Just as background, the checksum lets you verify that the iso isn't corrupted. The convoluted procedure is failing for a good iso. What I've discovered is that while many distros have made the checking procedure bulletproof (virtually no chance of getting a corrupt or tampered-with iso), they've introduced multiple potential points of failure for good isos. It seems to happen with some frequency with Fedora. So your windows command may be different from what I show below just follow the simple instructions for the utility you use.Įvery once in awhile, I run into the same problem, where an iso checksum doesn't match. You don't need anything fancy anything that runs in your version of Windows and calculates the sha256 hash. These are simple utilities, so even old recommendations are likely to be fine. I've been away from Windows for awhile, but just Google "windows sha256 checksum" and there are tons of links and recommendations. So the local download directory is probably different from what I mention (just substitute your actual download directory), and Windows may not come bundled with a checksum utility.įree checksum utilities are readily available. If ( $download_checksum -eq "$expected_checksum" ) ĮDIT: This answer was written assuming the iso checking was being conducted in Linux. $sha256 = New-Object -TypeName 256CryptoServiceProvider $expected_checksum = ((Get-Content $checksum_file | Select-String -Pattern $image) -split " ").ToLower() ![]() Am I doing something wrong, is the tutorial incomplete or the file in the server is corrupted?įOR KDE: $image = "Fedora-KDE-Live-x86_64-29-1.2.iso" I tried checksum Fedora Workstation 29 and Fedora KDE Plasma but it's always fail. ![]()
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