tldr/pages/linux/sha256sum.md

sha256sum

Calculate SHA256 cryptographic checksums.

• Calculate the SHA256 checksum for file(s) or files in a directory, one checksum per file:

sha256sum {{filename1}} sha256sum {{filename1}} {{filename2}} sha256sum {{directory/\*}}

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

sha256sum -c {{filename.sha256}}