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Sounds like a DNS issue to me, which is why LDAP is not starting. Please provide the following
is your domain name really gos-vmware-virtual-appliance.com ?
dig gos-vmware-virtual-appliance.com mx
dig gos-vmware-virtual-appliance.com ns
host `hostname` <- note backticks and not double quotes
the error messages for zmcontrol are because, I think it is a perl script, and therefore running with sh -x will not execute the perl commands inside.