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Annotation of researchv10dc/man/adm/man1/sum.1, revision 1.1.1.1

1.1       root        1: .TH SUM 1
                      2: .CT 1 files
                      3: .SH NAME
                      4: sum, treesum \- sum and count blocks in a file
                      5: .SH SYNOPSIS
                      6: .B sum
                      7: [
                      8: .B -5ri
                      9: ]
                     10: [
                     11: .I file ...
                     12: ]
                     13: .PP
                     14: .B treesum
                     15: [
                     16: .I file ...
                     17: ]
                     18: .SH DESCRIPTION
                     19: By default,
                     20: .I sum
                     21: calculates and prints a 32-bit checksum,
                     22: a byte count
                     23: and the name of
                     24: each
                     25: .IR file .
                     26: The checksum is also a function of the input length.
                     27: If no files are given,
                     28: the standard input is
                     29: summed.
                     30: Other summing algorithms are available.
                     31: The options are
                     32: .TP
                     33: .B -i
                     34: Read file names from standard input.
                     35: .TP
                     36: .B -r
                     37: Sum with the algorithm of System V's
                     38: .B "sum -r"
                     39: and print the length (in 1K blocks) of the input.
                     40: .TP
                     41: .B -5
                     42: Sum with System V's default algorithm
                     43: and print the length (in 512-byte blocks) of the input.
                     44: .PP
                     45: .I Sum
                     46: is typically used to look for bad spots,
                     47: to validate a file communicated over
                     48: some transmission line or
                     49: as a quick way to determine if two files might be the same.
                     50: .PP
                     51: .I Treesum
                     52: is similar to
                     53: .BR "sum -r" ,
                     54: except that if
                     55: .I file
                     56: is a directory, then
                     57: .I treesum
                     58: recursively descends it, summing all non-directories encountered.
                     59: If no files are given,
                     60: .IR treesum
                     61: recursively sums the current directory.
                     62: .SH "SEE ALSO"
                     63: .IR wc (1)

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