#! perl
use strict;
use warnings;
use Data::Dump;

    $/ = undef;
my  $x = <DATA>;
my  @y = $x =~ / CentOs \s+ ( \d+ (?: \. \d+)? ) /mgix;
dd \@y;

__DATA__
data
This is CentOs 6.5 version and CentOs  5.5 is not supported.
The CentOS 6 has ability for LVM Snap backups where as CentOs 5.5 doesn't.

##</code><code>##

12:30 >perl 1117_SoPW.pl
[6.5, 5.5, 6, 5.5]

12:30 >