SUM(1) SUM(1) sum - checksum and count the blocks in a file sum []... []... Print or check BSD (16-bit) checksums. Legacy interface to the cksum utility. , -, . -r use BSD sum algorithm (the default), use 1K blocks -s, --sysv V, 512 --help --version . : bug-coreutils@gnu.org coreutils : : Copyright (C) 2026 Free Software Foundation, Inc. 3+: 3 . : . , . ,,info '(coreutils) sum invocation'" ; 3 . . , - TODO <>. coreutils 9.11 2026 SUM(1)