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