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Full Discussion: How to sort version numbers?
Top Forums Shell Programming and Scripting How to sort version numbers? Post 302626371 by LessNux on Thursday 19th of April 2012 08:55:04 AM
Old 04-19-2012
Question How to sort version numbers?

I would like to know how to sort version numbers, using bash or perl. I would like to sort file names that are program names with version numbers and extensions, such as hello-0.2.3.tar.gz and hello-0.10.3.tar.gz.

Version numbers of computer programs do not comply with the mathematical rule concerning the below-decimal-point part. Mathematics treats the part below decimal point differently from the integral part. In mathematics, the following sort order holds.

0.1 = 0.10 = 0.100 < 0.11 < 0.2 < 0.3

On the other hand, the version numbering system treats the part below decimal point in the same manner as the integral part. In the version numbering system, the following sort order holds.

0.1.0 < 0.2.0 < 0.3.0 < 0.10.0 < 0.11.0 < 0.100.0

The "sort" command on bash fails to achieve this latter result. How can one achieve this latter result?

Many thanks in advance.
 

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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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