| sum, md5sum, sha1sum \- sum and count blocks in a file |
| calculates and prints a 32-bit hexadecimal checksum, |
| The checksum is also a function of the input length. |
| Other summing algorithms are available. |
| Sum with the algorithm of System V's |
| and print the length (in 1K blocks) of the input. |
| Sum with System V's default algorithm |
| and print the length (in 512-byte blocks) of the input. |
| is typically used to look for bad spots, |
| to validate a file communicated over |
| some transmission line or |
| as a quick way to determine if two files on different machines might be the same. |
| computes the 32 hex digit RSA Data Security, Inc. MD5 Message-Digest Algorithm |
| computes the 40 hex digit National Institute of Standards and Technology SHA1 secure hash algorithm |
| described in FIPS PUB 180-1. |
| .B /usr/local/plan9/src/cmd/sum.c |
| .B /usr/local/plan9/src/cmd/md5sum.c |
| .B /usr/local/plan9/src/cmd/sha1sum.c |
