How to set domainname in RHEL7.3 machine

Question

I have to setup domainname right now when i am typing below command i am getting nonne

[root@username ~]# domainname
(none)

But hostname command giving proper result

[root@username ~]# hostname
username

I try to add below in vim /etc/hosts

<Server IP> example.com

but even this change wont help me.

I am trying to resolve this issue

https://stackoverflow.com/questions/47454271/olcrootpw-can-only-be-set-when-rootdn-is-under-suffix

Solution

Are you sure you want the domainname and not hostname or hostname -d? The domainname is used on hosts with NIS(YP).

If you want to set just the hostname in FQDN form, use following command:

hostnamectl set-hostname hostname.example.com

And yes, don't forget to put it into /etc/hosts.

Comments

[Subodh Joshi]

Thanks for your reply but hostname command already giving the result .

[Jaroslav Kucera]

And are you using NIS?

[Subodh Joshi]

Sorry but i am newbie in this what is NIS?

[Jaroslav Kucera]

That's the why I'm asking. domainname returns the NIS domain. The NIS is described here: en.wikipedia.org/wiki/Network_Information_Service

[Subodh Joshi]

FYI..this is a virual machine inside a organization but i raised this issue due to i am getting issue in the Ldap Configuration .