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Top Forums Shell Programming and Scripting Need help with Unix Post 302679775 by rangarasan on Tuesday 31st of July 2012 03:55:09 PM
Old 07-31-2012
Quote:
Originally Posted by rules
sort -t "~" -k 1.19,1.29 -k 2.1,2.5 in unix

- I have to understand what exactly this command will do ?Smilie
This command sort the file based on the first field's 19-29 characters and second field's 1-5 characters. Here delimiter is '~'.
Code:
-k column-no.starting-char,column-no.ending-char

It wont consider other than the specified char in a field for sorting.

Last edited by rangarasan; 07-31-2012 at 04:59 PM.. Reason: additional info
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SORT(1) 						      General Commands Manual							   SORT(1)

NAME
sort - sort a file of ASCII lines SYNOPSIS
sort [-bcdfimnru] [-tc] [-o name] [+pos1] [-pos2] file ... OPTIONS
-b Skip leading blanks when making comparisons -c Check to see if a file is sorted -d Dictionary order: ignore punctuation -f Fold upper case onto lower case -i Ignore nonASCII characters -m Merge presorted files -n Numeric sort order -o Next argument is output file -r Reverse the sort order -t Following character is field separator -u Unique mode (delete duplicate lines) EXAMPLES
sort -nr file # Sort keys numerically, reversed sort +2 -4 file # Sort using fields 2 and 3 as key sort +2 -t: -o out # Field separator is : sort +.3 -.6 # Characters 3 through 5 form the key DESCRIPTION
Sort sorts one or more files. If no files are specified, stdin is sorted. Output is written on standard output, unless -o is specified. The options +pos1 -pos2 use only fields pos1 up to but not including pos2 as the sort key, where a field is a string of characters delim- ited by spaces and tabs, unless a different field delimiter is specified with -t. Both pos1 and pos2 have the form m.n where m tells the number of fields and n tells the number of characters. Either m or n may be omitted. SEE ALSO
comm(1), grep(1), uniq(1). SORT(1)
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