47 lines
1.7 KiB
Groff
47 lines
1.7 KiB
Groff
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.TH PARALLEL-SUMS 1 "February 2019" "Jigit jigdo tools"
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.SH NAME
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parallel-sums \- Calculate checksums in parallel using multiple algorithms
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.SH SYNOPSIS
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.B parallel-sums
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\-\-algo1 \fBALGO1FILE\fR
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[\-\-algo2 \fBALGO2FILE\fR ... \-\-algoN \fBALGONFILE\fR]
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file1 [file2 ... fileN
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.PP
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.B parallel-sums
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\-\-help
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.SH DESCRIPTION
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.PP
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parallel-sums is designed to make it faster and easier to create
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checksum files using multiple algorithms. It will only read the data
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from each input file once, spawning a new thread per checksum
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algorithm requested and running calculations in parallel.
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.PP
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Specify the list of desired checksum algorithms along with the output
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filename for each checksum type, then pass the list of files.
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.PP
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The output is intended to be 100% compatible with the file formats of
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existing tools like md5sum, sha256sum etc.
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.TP
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\fB\-\-algo ALGOSUMS\fR
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Checksum all input files using the algorithm "algo" and output the
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checksums in the file ALGOSUMS.
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.TP
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\fB\-\-help\fR
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Print usage information and list the checksum algorithms supported.
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.SH "EXAMPLES"
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.TP
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\fBparallel-sums \-\-md5sum MD5SUMS \-\-sha256sum SHA256SUMS *.iso\fR
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Read all files matching the pattern *.iso. In parallel, checksum each
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file using the MD5 algorithm (writing to "MD5SUMS") and checksum each
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file using the SHA256 algorithm (writing to "SHA256SUMS").
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.SH "SEE ALSO"
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\fBmd5sum\fP(1), \fBsha1sum\fP(1), \fBsha256sum\fP(1) and \fBsha512sum\fP(1).
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.SH "COPYRIGHT"
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Copyright 2017-2019 Steve McIntyre (steve@einval.com)
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.PP
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parallel-sums may be copied under the terms and conditions of version
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2 of the GNU General Public License, as published by the Free Software
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Foundation (Cambridge, MA, USA).
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.SH "AUTHOR"
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Written by Steve McIntyre (steve@einval.com)
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