Setting domain name/nis domainname permanently

[Jensener]

Setting the domain name using the command "domainname example.com" or the NIS domain name using "nisdomainname example.com" works fine but how do I set them permanently? Entering DOMAINNAME=example.com or NISDOMAIN=example.com in /etc/sysconfig/network (as it was in CentOS 6) has no effect.

[TrevorH]

NIS is a complete mystery to me but how does this relate to the hostname? Perhaps hostnamectl is what you're after on CentOS 7?

[Jensener]

"hostnamectl" lets me set the hostname of the client but neither the domain name nor the NIS domainname...

[thanhtaolao]

try to edit file: /etc/hostname

add the name of your host, ex: cent7

[Jensener]

try to edit file: /etc/hostname
add the name of your host, ex: cent7

Doesn't work. The command "domainname" still gives me "(none)" and the output of "ypdomainname" is still "ypdomainname: Local domain name not set"

[Jensener]

I solved it by entering the following into /etc/sysctl.conf:

kernel.domainname=example.com

It sets the domain name and NIS domain name permanently.

[mike.scchen]

I've just found that the service "rhel-domainname" reads /etc/sysconfig/network for the NISDOMAIN line, but is NOT enabled.
But there's a bug in the .service file that will stop the system from booting if enabled:
https://admin.fedoraproject.org/updates ... .51-2.fc20

So, add the line:
DefaultDependencies=no
in the [Unit] section of /usr/lib/systemd/system/rhel-domainname.service
and then simply:
systemctl enable rhel-domainname
will do the trick and make it work as before.

The steps above has been tested with initscripts-9.49.17-1.el7_0.1 on CentOS 7.