sum (Unix)
sum is a legacy utility available on some Unix and Unix-like operating systems. This utility outputs a 16-bit checksum of each argument file, as well as the number of blocks they take on disk. Two different checksum algorithms are in use. POSIX abandoned sum in favor of cksum.
| Original author(s) | Ken Thompson |
|---|---|
| Developer(s) | AT&T Bell Laboratories |
| Initial release | November 3, 1971 |
| Operating system | Unix, Unix-like, Inferno |
| Platform | Cross-platform |
| Type | Command |
| License | coreutils: GPLv3+ |
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