3 sum, md5sum, sha1sum \- sum and count blocks in a file
25 calculates and prints a 32-bit hexadecimal checksum,
30 The checksum is also a function of the input length.
31 If no files are given,
34 Other summing algorithms are available.
38 Sum with the algorithm of System V's
40 and print the length (in 1K blocks) of the input.
43 Sum with System V's default algorithm
44 and print the length (in 512-byte blocks) of the input.
47 is typically used to look for bad spots,
48 to validate a file communicated over
49 some transmission line or
50 as a quick way to determine if two files on different machines might be the same.
53 computes the 32 hex digit RSA Data Security, Inc. MD5 Message-Digest Algorithm
62 computes the 40 hex digit National Institute of Standards and Technology SHA1 secure hash algorithm
63 described in FIPS PUB 180-1.
70 .B /usr/local/plan9/src/cmd/sum.c
72 .B /usr/local/plan9/src/cmd/md5sum.c
74 .B /usr/local/plan9/src/cmd/sha1sum.c