Manual pages › General commands (1)
sum-original(1)
print checksum and block count of a file
From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.
With the coreutil package (with the extra set), see sum(1) instead.
Also by this name: sum(1B), BSD versions of commands
NAME
sum - print checksum and block count of a file
SYNOPSIS
sum [-r] file
DESCRIPTION
sum calculates and prints a 16-bit checksum for the named file, and also prints 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. The option -r causes an alternate algorithm to be used in computing the checksum.
SEE ALSO
wc(1).
DIAGNOSTICS
``Read error'' is indistinguishable from end of file on most devices; check the block count.