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sum [option ] file

Calculate and print a checksum and the number of (512-byte) blocks for file . Possibly useful for verifying data transmission. See also cksum in Chapter 2 .

Note: /usr/ucb/sum reports sizes in kilobytes, while /usr/bin/sum reports sizes in 512-byte blocks, even with the -r option.



Use an alternate checksum algorithm; this produces the same results as the BSD version of sum .

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