cksum - display file checksum and size
cksum [file ...]
cksum # Display CRC and size of stdin cksum *.c # Display CRC and size of .c files
Cksum calculates and writes to standard output the 32-bits CRC of the input files , or of stdin if no files were specified. The size in bytes of each file will be displayed after a space. The name of each file will be displayed after another space.