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Full Discussion: Sort question.
Top Forums Shell Programming and Scripting Sort question. Post 302644867 by nua7 on Tuesday 22nd of May 2012 02:12:28 PM
Old 05-22-2012
Sort question.

Hi Guys,
I have a file to be sorted and uniq with the following format.

Code:
S00001002|01|20021231
S00001002|01|20011031
S00001006|01|20120430
S00001006|01|20111231
S00001006|01|20111031
S00001006|01|20110831
S00001006|01|20110731
S00001006|01|20101231
S00001006|01|20091231
S00001006|01|20081231
S00001006|01|20071231
S00001006|01|20071130
S00001006|01|20061231
S00001006|01|20061031
S00001006|01|20051231
S00001006|01|20011130
S00001006|01|20010731
S00001009|01|20010430
S00001023|01|20090430

The desired output is

Code:
S00001002|01|20021231
S00001006|01|20120430
S00001009|01|20010430
S00001023|01|20090430


I am trying to use the sort and uniq command for the first 13 characters.

Code:
sort -k 1,13 file1 | uniq  > file2

Looks like I am missing something in the sort command here.Can you please help.
 

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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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