ksu(1) - phpMan

cksum (1)            - checksum and count the bytes in a file
cksum (1p)           - write file checksums and sizes
DES_cbc_cksum (3ssl) - DES encryption
DES_quad_cksum (3ssl) - DES encryption
fipshmac (8)         - create FIPS-140-2 validation checksum files
innochecksum (1)     - offline InnoDB file checksum utility
shasum (1)           - Print or Check SHA Checksums
sum (1)              - checksum and count the blocks in a file
tc-csum (8)          - checksum update action