CKSUM(1) CKSUM(1) (NAME) cksum - (SYNOPSIS) cksum []... []... (DESCRIPTION) . CRC . - . . -a, --algorithm=TYPE . << (DIGEST)>> --base64 base64 -c, --check -l, --length=BITS blake2b sha2 sha3 --raw --tag BSD ( ) --untagged -z, --zero NUL : --ignore-missing --quiet OK --status --strict -w, --warn --debug --help --version (DIGEST) : sysv ( sum -s) bsd ( sum -r) crc ( cksum) crc32b ( cksum ) md5 ( md5sum) sha1 ( sha1sum) sha2 ( sha{224,256,384,512}sum) sha3 ( cksum ) blake2b ( b2sum) sm3 ( cksum ) . (AUTHOR) Padraig Brady Q. Frank Xia. (REPORTING BUGS) : bug-coreutils@gnu.org GNU coreutils: : (COPYRIGHT) (C) 2026 Free Software Foundation, Inc. GPLv3+: GPL . : . . (SEE ALSO) : : info '(coreutils) cksum invocation' GNU coreutils 9.11 CKSUM(1)