sha256sum

Calculate SHA256 cryptographic checksums. More information: https://www.gnu.org/software/coreutils/manual/html_node/sha2-utilities.html.

• Calculate the SHA256 checksum for one or more files:

sha256sum path/to/file1 path/to/file2 …

• Calculate and save the list of SHA256 checksums to a file:

sha256sum path/to/file1 path/to/file2 … > path/to/file.sha256

• Calculate a SHA256 checksum from stdin:

command | sha256sum

• Read a file of SHA256 checksums and filenames and verify all files have matching checksums:

sha256sum --check path/to/file.sha256

• Only show a message for missing files or when verification fails:

sha256sum --check --quiet path/to/file.sha256

• Only show a message when verification fails, ignoring missing files:

sha256sum --ignore-missing --check --quiet path/to/file.sha256

• Check a known SHA256 checksum of a file:

echo known_sha256_checksum_of_the_file path/to/file | sha256sum --check