Plesk has the disadvantage that everything is done through thedatabase. So we can’t just modify Bind’s Zone files.To add an A record of a subdomain you have to do the following:/usr/local/psa/bin/dns -a domain.tld -a subdomain -ip 127.0.0.1the first -a is for add to zone which is why it must specify the toplevel domen, the second is for A record, and must not contain the fulldomain only the subdomain. If you use the full domainsubdomain.