This is excerpted from https://www.samba.org/samba/docs/current/man-html/samba-tool.8.html dns add server zone name A|AAAA|PTR|CNAME|NS|MX|SRV|TXT data What is "data"? The samba-tool man page provided no further explanation. dns zonecreate server zone [options] [options] isn't explained, either.