![]() As such, if the code generated from the ISO file matches that contained in the checksum file, then the ISO is fine otherwise, if the two codes don't match then it means that the ISO file has changed in some way, most likely due to being corrupted. Once you download the image, you can use software to recreate the physical installation media. These images are usually freely available online. As an example, most distributions of Linux release ISO images of the installation CDs. ISO images are mainly used as source files from which to create CDs. An ISO image (.iso) is simply a CD-ROM image saved in ISO-9660 format. ![]() The checksum file itself is just a text document that contains a code that should match the code generated by the sha1 or sha256 algorithm. Image files, unlike normal files, are usually not opened rather, they are mounted. However, if you are unsure, then it is recommended to use sha256. Whichever you decide to use is entirely your choice. Whilst sha1 is the most commonly used version, sha256 is a later and more secure version. sha1 and sha256 are different versions of the algorithm that you can use to do this. ![]() This algorithm is used to generate a particular code unique to the downloaded ISO image. The sha part of the checksum file name stands for Secure Hash Algorithm.This algorithm is used to generate a particular code unique to the downloaded ISO image. The 'sha' part of the checksum file name stands for Secure Hash Algorithm. ![]()
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February 2023
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