.TH SHA256SUM 1 sbase\-VERSION .SH NAME sha256sum \- compute SHA256 message digest .SH SYNOPSIS .B sha256sum .RB [\-c] .RI [ file ...] .TP .B \-c read list of SHA256 checksums from file and check them .SH DESCRIPTION Print SHA256 (256-bit) checksums. With no file, read standard input.