The best tool to use to verify the integrity of a file is A. sha256sum. This tool will compute and display the SHA-256 hash of a file, which is a 64-digit hexadecimal number that uniquely identifies the file’s content. By comparing the hash of a downloaded file with the hash provided by the file owner or source, you can confirm that the file has not been altered or corrupted during the transfer. The other tools are either not relevant or not suitable for this task. For example:
B. fsck is a tool for checking and repairing the file system, but it does not verify the integrity of individual files.
C. gpg -d is a tool for decrypting files that have been encrypted with GnuPG, but it does not verify the integrity of unencrypted files.
D. hashcat is a tool for cracking passwords or hashes, but it does not verify the integrity of files.
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