Each file will have a corresponding checksum in sha256 and sha512. The process will be different between operating systems.

To compare checksums on Linux open the terminal and use sha256sum path-to-image-file.img.xz and sha512sum path-to-image-file.img.xz.

To compare checksums on MacOS open the terminal and use shasum -a 256 path-to-image-file.img.xz and shasum -a 512 path-to-image-file.img.xz.

To compare checksums on Windows open the command prompt and use -hashfile image-file.img.xz SHA256 and -hashfile image-file.img.xz SHA512.

Compare the checksums on the website with the checksums of your local files. If they don’t match, you’ll need to re-download the files.