Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[Gregory P. Ennis]

We can permanently set hostname using  hostnamectl set-hostname. How
can we
permanently set *domain name* in CentOS 7?
I found an article

that recommended setting FQDN using hostnamectl. Is that the right way
to
set hostname and domainname at the same time using *hostnamectl
set-hostname* command?

 Running *hostnamectl set-hostname* will set the hostname in*
/etc/hostname*
but it doesn't change */etc/hosts*. What's the proper way of adding
hostname and FQDN to */etc/hosts *in CentOS 7?

Thanks,

Joe
___

Joe,

I used the following command in the /etc/rc.d/rc.local file which is
used at boot time.

/bin/domainname Domain.com

Make sure you also use :

chmod +x /etc/rc.d/rc.local

to make sure the file is executable.

Greg



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Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[John R Pierce]

On 4/6/2016 11:34 AM, James Hogarth wrote:

On 6 April 2016 at 15:45, Mark Haney  wrote:


>Not sure about everyone else, but I always put my hostname in /etc/hosts.
>Maybe that's from years of not always having DNS available back when the
>earth was cooling.
>
>

This behaviour plays havoc with templated VMs though or any time you can't
be sure the IP there will be correct ...


indeed, most all my servers except a few key infrastructure servers are 
configured with DHCP reservations.




--
john r pierce, recycling bits in santa cruz

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Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[James Hogarth]

On 6 April 2016 at 15:45, Mark Haney  wrote:

> Not sure about everyone else, but I always put my hostname in /etc/hosts.
> Maybe that's from years of not always having DNS available back when the
> earth was cooling.
>
>
This behaviour plays havoc with templated VMs though or any time you can't
be sure the IP there will be correct ...

At which point you start having to script fixing it etc or weird things
happen.

I can't recall if it hit EL7 yet but Fedora has nss-myhostname so it'll
probably arrive in EL7 eventually to ensure the local hostname is always
resolvable to the system IP if it exists or at least   127.0.0.2 so stuff
relying on gethostname() doesn't have issues and  the older /etc/hosts
shenanigans are not required.
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Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[Mark Haney]

Not sure about everyone else, but I always put my hostname in /etc/hosts.
Maybe that's from years of not always having DNS available back when the
earth was cooling.


On Apr 5, 2016 16:30, "James Hogarth"  wrote:

> On 5 April 2016 at 20:24, Joe Smithian  wrote:
>
> > We can permanently set hostname using  hostnamectl set-hostname. How can
> we
> > permanently set *domain name* in CentOS 7?
> > I found an article
> > <
> >
> http://unix.stackexchange.com/questions/239920/how-to-set-the-fully-qualified-hostname-on-centos-7-0
> > >
> > that recommended setting FQDN using hostnamectl. Is that the right way to
> > set hostname and domainname at the same time using *hostnamectl
> > set-hostname* command?
> >
> >  Running *hostnamectl set-hostname* will set the hostname in*
> > /etc/hostname*
> > but it doesn't change */etc/hosts*. What's the proper way of adding
> > hostname and FQDN to */etc/hosts *in CentOS 7?
> >
> >
> Technically speaking one shouldn't put the hostname in /etc/hosts as it's
> not required so long as your DNS is working ... which it should be ...
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Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[James Hogarth]

On 5 April 2016 at 20:24, Joe Smithian  wrote:

> We can permanently set hostname using  hostnamectl set-hostname. How can we
> permanently set *domain name* in CentOS 7?
> I found an article
> <
> http://unix.stackexchange.com/questions/239920/how-to-set-the-fully-qualified-hostname-on-centos-7-0
> >
> that recommended setting FQDN using hostnamectl. Is that the right way to
> set hostname and domainname at the same time using *hostnamectl
> set-hostname* command?
>
>  Running *hostnamectl set-hostname* will set the hostname in*
> /etc/hostname*
> but it doesn't change */etc/hosts*. What's the proper way of adding
> hostname and FQDN to */etc/hosts *in CentOS 7?
>
>
Technically speaking one shouldn't put the hostname in /etc/hosts as it's
not required so long as your DNS is working ... which it should be ...
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Re: [CentOS] How to set hostname and domainnmae in CentOS 7?

[Mark Haney]

vi or your text editor of choice. Though there should be a 'domainname'
command to set it as well, though I just prefer editing /etc/hosts directly.



On Tue, Apr 5, 2016 at 3:24 PM, Joe Smithian  wrote:

> We can permanently set hostname using  hostnamectl set-hostname. How can we
> permanently set *domain name* in CentOS 7?
> I found an article
> <
> http://unix.stackexchange.com/questions/239920/how-to-set-the-fully-qualified-hostname-on-centos-7-0
> >
> that recommended setting FQDN using hostnamectl. Is that the right way to
> set hostname and domainname at the same time using *hostnamectl
> set-hostname* command?
>
>  Running *hostnamectl set-hostname* will set the hostname in*
> /etc/hostname*
> but it doesn't change */etc/hosts*. What's the proper way of adding
> hostname and FQDN to */etc/hosts *in CentOS 7?
>
> Thanks,
>
> Joe
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>



-- 

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*VIF* *International Education*
P.O. Box 3566 ::: Chapel Hill, N.C. 27515 ::: USA
919-265-5006 office

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[CentOS] How to set hostname and domainnmae in CentOS 7?

[Joe Smithian]

We can permanently set hostname using  hostnamectl set-hostname. How can we
permanently set *domain name* in CentOS 7?
I found an article

that recommended setting FQDN using hostnamectl. Is that the right way to
set hostname and domainname at the same time using *hostnamectl
set-hostname* command?

 Running *hostnamectl set-hostname* will set the hostname in* /etc/hostname*
but it doesn't change */etc/hosts*. What's the proper way of adding
hostname and FQDN to */etc/hosts *in CentOS 7?

Thanks,

Joe
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