NAME

sha256sum — write and verify sha256 checksums

SYNOPSIS

sha256sum [-c] [file...]

sha256sum reads each file, or standard input if none were specified, and prints each of their SHA256 checksum.

-c: Verify checksums contained in each file. Currently supported format being checksum, whitespace, an optional asterisk ‘*’ and finally a filename.

The sha256sum utility exits 0 on success, and >0 if an error occurs.

Check tarballs in current directory against the sha256sums.txt digest and ignore the rest of it:

printf %s\n *.tar* | grep -f -
  sha256sums.txt | sha256sum -c -

SHA256 is standardized both in FIPS 180-4 and RFC 6234.

Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>