tldr/pages/common/sha256sum.md

sha256sum

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

• Calculate the SHA256 checksum for a file:

sha256sum {{path/to/file}}

• Calculate SHA256 checksums for multiple 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}}

• Read a file of SHA256 sums 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 for files for which verification fails, ignoring missing files:

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