![]() POWERSHELL CHECKSUM DOWNLOADIf you download the files, what you’d do from PowerShell is run “Get-FileHash” and specify the path to the file you want checked. You’ll see on the tab “Installation Instruction” that they have the hash/checksum values listed there. HPE, for example, tends to include the hash values in the notes along with the download files. Take a look at this file for the ILO 5 firmware update. Some vendors publish the information pretty consistently. Get- FileHash is the built-in PowerShell cmdlet that can be used to generate a hash value, allowing you verify against the reference hash. Details of the cmdlet and options are located in Previously you needed a 3rd party tool to do this, but PowerShell provides a handy cmdlet to perform the computations for you. Every algorithm will generate a different hash, but the utility used to generate the hash will always generate the same hash value when you choose the same algorithm. There are different algorithms and utilities to generate these hash values. This hash value is then published alongside the file you’re downloading, which allows you to run that same hash algorithm against your downloaded file and verify the hashes match. This hash value is much smaller than the actual size of the file. A hash is a string of characters that is generated by analyzing the bytes of the file using a specific algorithm. To truly accomplish this comparison and validation, we can use something known as a hash. It doesn’t verify the integrity of the file in any way. Additionally, that just proves the file you downloaded was the same one that was published. But that’s not often practical or possible for files you’ve downloaded. Ideally, to make sure the file you have downloaded is exactly the same as the source, you would do a byte-to-byte comparison. Downloading and verifying that a file hasn’t been inadvertently or maliciously changed has been something admins have done for a while. ![]()
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