yea tried to understand the code before i used it think i understand it.
here is what i plugged it into..
it just a simpole script that uses mobile agents to relocate to another machine then run the code in do_it on that machine and returns a scalar containg the contents of df -Tm
these are then stored in a hash this is done for a couple of machines then the contents of the hash must be sorted to display a ranked listing of the machines with the most space available

#! /usr/bin/perl -w
#
# drivespace
#
use strict;
use Mobile::Executive;
my %space;

######################################################################
+######################################################

sub do_it
{
        return scalar `df -Tm`;
}

######################################################################
+#######################################################

relocate( 'xxx.xxx.xxx.xxx', 2001 );
$space{ 'xxx.xxx.xxx.xxx' } = do_it;
relocate( 'xxx.xxx.xxx.xxx', 2001 );
$space{ 'xxx.xxx.xxx.xxx'} = do_it;

#relocate( 'xxx.xxx.xxx.xxx', 2001 );
#$space { 'xxx.xxx.xxx.xxx'}= do_it;
#relocate( 'xxx.xxx.xxx.xxx', 2001 );
#$space = { 'xxx.xxx.xxx.xxx'}do_it;
#relocate( 'xxx.xxx.xxx.xxx', 2001 );
#$space = { 'xxx.xxx.xxx.xxx'}do_it;

relocate( 'xxx.xxx.xxx.xxx', 2001 );

my $counter = 1;
my @out;
my @lines;
my $disk_used = 0;
my $free = 0;

print "host:volume              available(MB)   %free\n";
foreach my $host (keys %space)
{
        $_ = $space{$host};
        @lines = map {
        /(\/\w+\/\w+)\s+\w+\s+\d+\s+\d+\s+(\d+)\s+(\d+)%/;
        {
                volume => $1,
                available => $2,
                free => 100 - $3,
        }
        }split /\n/,$space{$host};

        #This is the sorting line!
        @lines = sort { $b->{available} <=> $a->{available} } @lines;

        push @out, "$host:$_->{volume}    $_->{available}    $_->{free
+}%" for @lines;

}
[download]

Edited by Chady -- removed real IPs

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