[systemd-devel] How do you set the machine's domain name with systemd?

[Adam Nielsen]

Hi all,

I have just switched my Arch Linux machine to systemd and it mostly works, but
I'm encountering a few issues.

For one, all my NFS mounts are failing, and it seems to be because I have
granted permission via domain name, and since switching to systemd my machine
no longer has a domain name, so I'm getting access denied errors:

$ cat /etc/hostname
korath

$ hostname
korath

$ hostname -s
localhost

$ hostname -f
localhost.localdomain

Why is the short name being reported as localhost? How can I change the
domain to my actual domain name instead of "localdomain"? According to all
the documentation, the domain name should not be specified in /etc/hostname -
so where should it go?

Many thanks,
Adam.

[Reindl Harald]

Post by Adam Nielsen
$ cat /etc/hostname
korath
$ hostname
korath
$ hostname -s
localhost
$ hostname -f
localhost.localdomain
Why is the short name being reported as localhost? How can I change the domain to my actual domain name instead of
"localdomain"? According to all the documentation, the domain name should not be specified in /etc/hostname - so
where should it go?

besides that this is more a question for your distributions
list and not the DEVEL upstream-list:

[***@srv-rhsoft:~]$ cat /etc/hostname
srv-rhsoft.rhsoft.net

[***@srv-rhsoft:~]$ hostname
srv-rhsoft.rhsoft.net
[***@srv-rhsoft:~]$ hostname -s
srv-rhsoft
[***@srv-rhsoft:~]$ hostname -d
rhsoft.net
[***@srv-rhsoft:~]$ hostname -f
srv-rhsoft.rhsoft.net

[***@srv-rhsoft:~]$ rpm -q systemd
systemd-197-1.fc18.2.x86_64

[David Strauss]

Use hostnamectl, assuming your systemd version is new enough:

http://www.freedesktop.org/software/systemd/man/hostnamectl.html

Post by Reindl Harald

Post by Adam Nielsen
$ cat /etc/hostname
korath
$ hostname
korath
$ hostname -s
localhost
$ hostname -f
localhost.localdomain
Why is the short name being reported as localhost? How can I change the domain to my actual domain name instead of
"localdomain"? According to all the documentation, the domain name should not be specified in /etc/hostname - so
where should it go?

besides that this is more a question for your distributions
srv-rhsoft.rhsoft.net
srv-rhsoft.rhsoft.net
srv-rhsoft
rhsoft.net
srv-rhsoft.rhsoft.net
systemd-197-1.fc18.2.x86_64
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| ***@davidstrauss.net
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[Adam Nielsen]

Post by David Strauss
http://www.freedesktop.org/software/systemd/man/hostnamectl.html

Thanks for the suggestion, but unfortunately this doesn't seem to work:

$ hostnamectl set-hostname korath.my.domain.com

$ cat /etc/hostname
korathmydomaincom

$ pacman -Qi systemd | grep Ver
Version : 197-4

At a suggestion from my distro's discussion forum, manually editing
/etc/hostname and putting the FQDN back in there works. So I'm not sure
whether this is a bug in hostnamectl or whether editing /etc/hostname is still
the preferred way to set a machine's FQDN.

Also for the record the "localhost.localdomain" was because my short hostname
was listed against 127.0.0.1 in /etc/hosts. Removing that fixed that issue.

Thanks,
Adam.

[Jóhann B. Guðmundsson]

Post by Adam Nielsen

Post by David Strauss
http://www.freedesktop.org/software/systemd/man/hostnamectl.html

$ hostnamectl set-hostname korath.my.domain.com
$ cat /etc/hostname
korathmydomaincom

Known and annoying bug...

JBG

[Lennart Poettering]

This post might be inappropriate. Click to display it.

[Reindl Harald]

Post by Lennart Poettering

Post by Adam Nielsen

Post by David Strauss
http://www.freedesktop.org/software/systemd/man/hostnamectl.html

$ hostnamectl set-hostname korath.my.domain.com

So, we currently clean up names here a bit too drastically

you are making a big mistake here
if you think the input is wrong stop with a error message
but do NOT write different things as the users input in config files

this is a very bad style which became visible with this bug

[Lennart Poettering]

Post by Reindl Harald

Post by Lennart Poettering

Post by Adam Nielsen

Post by David Strauss
http://www.freedesktop.org/software/systemd/man/hostnamectl.html

$ hostnamectl set-hostname korath.my.domain.com

So, we currently clean up names here a bit too drastically

you are making a big mistake here
if you think the input is wrong stop with a error message
but do NOT write different things as the users input in config files
this is a very bad style which became visible with this bug

Well, it's not as simple as it might appear. "hostnamectl set-hostname"
actually sets the pretty hostname (and should do that unaltered), then
strips all the weird chars and sets the result as the unix hostname. You
should always have the pretty hostname in place.

The idea is that "Lennart's PC" as pretty hostname becomes "lennarts-pc"
as Unix hostname.

Lennart

[Reindl Harald]

Post by Lennart Poettering

Post by Reindl Harald

Post by Lennart Poettering

Post by Adam Nielsen

Post by David Strauss
http://www.freedesktop.org/software/systemd/man/hostnamectl.html

$ hostnamectl set-hostname korath.my.domain.com

So, we currently clean up names here a bit too drastically

you are making a big mistake here
if you think the input is wrong stop with a error message
but do NOT write different things as the users input in config files
this is a very bad style which became visible with this bug

Well, it's not as simple as it might appear. "hostnamectl set-hostname"
actually sets the pretty hostname (and should do that unaltered), then
strips all the weird chars and sets the result as the unix hostname. You
should always have the pretty hostname in place.
The idea is that "Lennart's PC" as pretty hostname becomes "lennarts-pc"
as Unix hostname

and this idea is wrong
there is no need for a "pretty hostname"

* a hostname is a hostname with it's rules
* a pretty name is a pretty name with no technical relation

[Lennart Poettering]

Post by Reindl Harald

Post by Lennart Poettering

Post by Reindl Harald
this is a very bad style which became visible with this bug

Well, it's not as simple as it might appear. "hostnamectl set-hostname"
actually sets the pretty hostname (and should do that unaltered), then
strips all the weird chars and sets the result as the unix hostname. You
should always have the pretty hostname in place.
The idea is that "Lennart's PC" as pretty hostname becomes "lennarts-pc"
as Unix hostname

and this idea is wrong
there is no need for a "pretty hostname"
* a hostname is a hostname with it's rules
* a pretty name is a pretty name with no technical relation

Well, read a book.

The pretty host name is inherent to mDNS/DNS-SD and used in Avahi, GNOME
and others for various purposes...

Lennart

[Reindl Harald]

Post by Lennart Poettering

Post by Reindl Harald

Post by Lennart Poettering

Post by Reindl Harald
this is a very bad style which became visible with this bug

Well, it's not as simple as it might appear. "hostnamectl set-hostname"
actually sets the pretty hostname (and should do that unaltered), then
strips all the weird chars and sets the result as the unix hostname. You
should always have the pretty hostname in place.
The idea is that "Lennart's PC" as pretty hostname becomes "lennarts-pc"
as Unix hostname

and this idea is wrong
there is no need for a "pretty hostname"
* a hostname is a hostname with it's rules
* a pretty name is a pretty name with no technical relation

Well, read a book.
The pretty host name is inherent to mDNS/DNS-SD and used in Avahi, GNOME
and others for various purposes...

and there is which technical need to make it not "lennarts-pc"
if you say "set-hostname" and not say "set-pretty-hostname"
besides that "Lennart's PC" is technical absoluetly not needed
and so this idea should never have side effects to the unix
hostname - KISS principle!

[Colin Guthrie]

This post might be inappropriate. Click to display it.

[Jóhann B. Guðmundsson]

Post by Lennart Poettering
I am figure "hostnamectl set-hostname" is currently a bit too drastic,
but I am not fond at all of the idea of adovcate this
fqdn-as-kernel-hostname nonsense any further, it sounds like the wrong
idea, from a very narrow IP+DNS mindset...

I would hardly call decades of networking, standard practices ( both
networking and sysadmin ) and all the experience that comes with it "a
very narrow IP+DNS mindset".

JBG

[Larry Baker]

# cd /etc/network.d
# mv wired-eth0{,.orig}
# cp examples/ethernet-static ./wired-eth0
# vi /etc/network.d/wired-eth0
# Set DECnet MAC address for host address 54.147, ALLMULTI
PRE_UP='ip link set eth0 address AA:00:04:00:93:D8 allmulticast on'
CONNECTION='ethernet'
DESCRIPTION='A basic static ethernet connection using iproute'
INTERFACE='eth0'
IP='static'
ADDR='130.118.44.225'
NETMASK='255.255.252.0'
#ROUTES=('192.168.0.0/24 via 192.168.1.2')
GATEWAY='130.118.44.1'
HOSTNAME='sheeva'
DNS=('130.118.4.2 130.118.4.7')
## For IPv6 autoconfiguration
#IP6=stateless
## For IPv6 static address configuration
#IP6='static'
#ADDR6=('1234:5678:9abc:def::1/64' '1234:3456::123/96')
#ROUTES6=('abcd::1234')
#GATEWAY6='1234:0:123::abcd'

Larry Baker
US Geological Survey
650-329-5608

Hi all,
I have just switched my Arch Linux machine to systemd and it mostly works, but I'm encountering a few issues.
$ cat /etc/hostname
korath
$ hostname
korath
$ hostname -s
localhost
$ hostname -f
localhost.localdomain
Why is the short name being reported as localhost? How can I change the domain to my actual domain name instead of "localdomain"? According to all the documentation, the domain name should not be specified in /etc/hostname - so where should it go?
Many thanks,
Adam.
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