The dnsdomainname command is used to display the domain name of the Fully Qualified Domain Name (FQDN) in the DNS system. It retrieves the domain name from the kernel and displays it on the standard output. This command is useful for system administrators who need to verify the domain name of their system.
Overview
The dnsdomainname command is simple to use. Simply type the command followed by the Enter key in a terminal window. The output will display the domain name of the FQDN name in the DNS system.
$ dnsdomainname
example.com
The output displays the domain name of the FQDN name in the DNS system, which is “example.com” in this case.
This command is useful for system administrators who need to verify the domain name of their system. For example, if you have multiple servers in your organization, you can use this command to ensure that all servers have the correct domain name.
Options
The dnsdomainname command does not have any options available.
Troubleshooting Tips
If the dnsdomainname command does not display the domain name, it is likely that the domain name is not set correctly in the DNS system. In this case, you should check the DNS configuration files and make sure that the domain name is set correctly.
Notes
- The
dnsdomainnamecommand retrieves the domain name from the kernel, which means that it may not always display the correct domain name. If the domain name is not set correctly in the kernel, the command may display the wrong domain name. - This command is only available on Linux systems. It is not available on other Unix-like systems such as macOS or FreeBSD.