#!/opt/local/perl/bin/perl -w

use strict;
use Net::SFTP;

my $sftp = Net::SFTP->new("serverURL.com",
                       user => "myUser",
                       password => 'myPassword',
                       debug => 1);

my $targetDir = "/ftp/pub";

# connection dropped at this line when run from cron, but not from command line
my $lsHashRef = $sftp->ls($targetDir);

map
{
    my $filename = $_->{filename};
    print "$filename\n";
} sort {$a->{filename} cmp $b->{filename}} @$lsHashRef;

print "Done!\n";