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Full Discussion: Sort command question
Top Forums Shell Programming and Scripting Sort command question Post 302871233 by Don Cragun on Tuesday 5th of November 2013 05:29:28 PM
Old 11-05-2013
The sort utility key field specifiers -k 1,3 and -k 12,4 are specifying ranges of fields (not output print columns). To sort on the 1st three characters (still not print columns) on the line as the primary sort key and the 12th through the 15th characters of the 1st field as the secondary sort key the way to specify it would be:
Code:
sort -k1.1,1.3 -k1.12,1.15 input.txt >output.txt

which would save:
Code:
3302013020101NS        40
348201310013RVE         2
600201309013GFJ        70
600201310013GFJ        70

in output.txt for the given sample input. Note that when all given sort keys give two or more lines the same sort order (as in the last two lines here), the tie is broken by using the entire line as a final increasing order alphanumeric sort key.

PS Note also that sort works on text, not binary data. It sorts characters; not bytes. If the file you're sorting is ASCII it might not matter; but if your text contains UTF-8 multibyte characters; it makes a big difference.

Last edited by Don Cragun; 11-05-2013 at 06:33 PM.. Reason: Note byte != character.
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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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