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Annotation of lucent/sys/man/1/sum, revision 1.1.1.1

1.1       root        1: .TH SUM 1
                      2: .SH NAME
                      3: sum, md5sum \- sum and count blocks in a file
                      4: .SH SYNOPSIS
                      5: .B sum
                      6: [
                      7: .B -5r
                      8: ]
                      9: [
                     10: .I file ...
                     11: ]
                     12: .PP
                     13: .B md5sum
                     14: [
                     15: .I file ...
                     16: ]
                     17: .SH DESCRIPTION
                     18: By default,
                     19: .I sum
                     20: calculates and prints a 32-bit hexadecimal checksum,
                     21: a byte count,
                     22: and the name of
                     23: each
                     24: .IR file .
                     25: The checksum is also a function of the input length.
                     26: If no files are given,
                     27: the standard input is
                     28: summed.
                     29: Other summing algorithms are available.
                     30: The options are
                     31: .TP
                     32: .B -r
                     33: Sum with the algorithm of System V's
                     34: .B "sum -r"
                     35: and print the length (in 1K blocks) of the input.
                     36: .TP
                     37: .B -5
                     38: Sum with System V's default algorithm
                     39: and print the length (in 512-byte blocks) of the input.
                     40: .PP
                     41: .I Sum
                     42: is typically used to look for bad spots,
                     43: to validate a file communicated over
                     44: some transmission line or
                     45: as a quick way to determine if two files on different machines might be the same.
                     46: .PP
                     47: .B Md5sum
                     48: computes the 32 hex digit RSA Data Security, Inc. MD5 Message-Digest Algorithm
                     49: described in RFC1321.
                     50: If no
                     51: .I files
                     52: are given,
                     53: the standard input is
                     54: summed.
                     55: .SH SOURCE
                     56: .B /sys/src/cmd/sum.c
                     57: .br
                     58: .B /sys/src/cmd/md5sum.l
                     59: .SH "SEE ALSO"
                     60: .IR cmp (1),
                     61: .IR wc (1)

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