| SUM(1B) | BSD System Compatibility | SUM(1B) |
sum - (BSD) sum and count blocks in a file
/usr/ucb/sum [file]
Sum calculates and prints a 16-bit checksum for the named file, and also prints the number of kilobytes in the file. It is typically used to look for bad spots, or to validate a file communicated over some transmission line.
cksum(1), wc(1)
`Read error' is indistinguishable from end of file on most devices; check the block count.
The checksum is identical to that obtained with the -r option of /usr/5bin/sum.
The algorithm may produce different results in different implementations. For this reason, cksum(1) should be used in preference.
| 10/11/03 | Heirloom Toolchest |