August 1999
Intermediate to advanced
1000 pages
83h 9m
English
Content preview from Solaris™ 7 Reference
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sum — Print Checksum and Block Count for a File
Synopsis
/usr/bin/sum [-r][file...] /usr/ucb/sum [file...]
Description
The sum command calculates and prints a 16-bit checksum for the named file and the number of 512-byte blocks in the file. It is typically used to look for bad spots or to validate a file communicated over some transmission line.
Portable applications should use cksum(1).
Note
sum and /usr/ucb/sum (see sum(1B)) return different checksums.
Options
| -r | Use an alternate (machine-dependent) algorithm in computing the checksum. |
Operands
| file | A path name of a file. If you specify no files, use the standard input. |
Examples
The following example displays a checksum for the file kookaburra-1.
castle% sum kookaburra-1 23823 1 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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