This creates a hash-of-arrays: 
use strict;
use warnings;
use Data::Dumper;
$Data::Dumper::Sortkeys=1;

my %hosts;
for (qx(mount | grep 'type nfs' | awk -F/ '{print \$1,\$3}' | sort)) {
    chomp;
    my ($host, $mp) = split;
    push @{ $hosts{$host} }, $mp;
}
print Dumper(\%hosts);

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See also:

In reply to Re: Data manipulation on a file by toolic
in thread Data manipulation on a file by sstruthe

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