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Full Discussion: Sort - Help Needed
Top Forums UNIX for Dummies Questions & Answers Sort - Help Needed Post 96512 by Andysundar on Friday 20th of January 2006 02:48:06 PM
Old 01-20-2006
Sort - Help Needed

Hi,

I am facing a small problem while I am doing the sort.

Problem Definition:

I have a file which has the following data.
>cat test.dat
zxzxc
asdasd
qwaxcZa
qwaxcA


When I do a sort on this file.

the result set is

asdasd
qwaxcA
qwaxcZa

zxzxc

But, we need to sort by using the first 5 charaters only.

The desired output should be

asdasd
qwaxcZa
qwaxcA

zxzxc

Can we do the sort by using only the first five characters of the field.

Any help is highly appriciated.

thanks
Anand
 

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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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