Domain Name System In Unix. The hostname is the shortname of the system instance with the FQDN being the hostname with the DNS domain name appended upon using a command to provide it. Hostname command in Linux is used to obtain the DNSDomain Name System name and set the systems hostname or NISNetwork Information System domain name.
The authoritative name servers are the only ones that have the authority to maintain and modify name data for a domain. B domainname show or set the systems NISYP domain name. A hostname show or set the systems host name.
A Domain Name System DNS server or name server is used to resolve an IP address to a hostname or vice versa.
It is normally used to convert the domain name to IP address and vice versa. B domainname show or set the systems NISYP domain name. Find IP using the host command. Dnsdomainname will print the domain part of the FQDN Fully Qualified Domain.