Команда cksum
The cksum command calculates and writes to standard output a cyclic redundancy check (CRC) for each input file, and also writes to standard output the number of octets in each file.
cksum file
| file | The name of the file you wish to check. |
cksum file - would give results similar to:
1740057581 19 file
When the file information is displayed it will be displayed in the following format:
"%u %d %s\n" <checksum>, <# of octets>, <path name>