Hi,
I have several machines running CentOS 6.2 and a strange problem with
the hostname of one machine... After every reboot it loses the fqdn
hostname.
Here is my confguration:
ifconfig | grep "inet addr"
inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
inet addr:127.0.0.1 Mask:255.0.0.0
/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=x800.mydomain.local
GATEWAY=10.0.0.1
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.0.12 x800.mydomain.local x800
... after a reboot:
hostname
x800.mydomain.local < OK
hostname -f
hostname: Unknown host < NOT OK
dnsdomainname
dnsdomainname: Unknown host < NOT OK
If I set the hostname manually:
hostname x800.mydomain.local
hostname -f
x800.mydomain.local < OK
dnsdomainname
mydomain.local < OK
Everything is okay ...
Something I've never experienced before. Does anyone have an idea?
thx
--
Chris
On Feb 8, 2012, at 4:22 PM, Chris wrote:> Hi, > > I have several machines running CentOS 6.2 and a strange problem with > the hostname of one machine... After every reboot it loses the fqdn > hostname. > > Here is my confguration: > > ifconfig | grep "inet addr" > inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0 > inet addr:127.0.0.1 Mask:255.0.0.0 > > /etc/sysconfig/network > > NETWORKING=yes > HOSTNAME=x800.mydomain.local > GATEWAY=10.0.0.1 > > 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 > ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 > 10.0.0.12 x800.mydomain.local x800 > > ... after a reboot: > > hostname > x800.mydomain.local < OK > > hostname -f > hostname: Unknown host < NOT OK > > dnsdomainname > dnsdomainname: Unknown host < NOT OK > > If I set the hostname manually: > > hostname x800.mydomain.local > > hostname -f > x800.mydomain.local < OK > > dnsdomainname > mydomain.local < OK > > Everything is okay ... > > Something I've never experienced before. Does anyone have an idea? > > thx > > -- > ChrisWhen I strace hostname -f I see it checking with my name server. Are your 2 systems set up differently with respect to name resolution and/or DNS? Tony
2012/2/8 Chris <xchris89x at googlemail.com>:> Hi, > > I have several machines running CentOS 6.2 and a strange problem with > the hostname of one machine... After every reboot it loses the fqdn > hostname. > > Here is my confguration: > > ifconfig | grep "inet addr" > ? ? ? ? ?inet addr:10.0.0.12 ?Bcast:10.0.0.255 ?Mask:255.255.255.0 > ? ? ? ? ?inet addr:127.0.0.1 ?Mask:255.0.0.0 > > /etc/sysconfig/network > > NETWORKING=yes > HOSTNAME=x800.mydomain.local > GATEWAY=10.0.0.1 > > 127.0.0.1 ? localhost localhost.localdomain localhost4 localhost4.localdomain4 > ::1 ? ? ? ? localhost localhost.localdomain localhost6 localhost6.localdomain6 > 10.0.0.12 ? x800.mydomain.local ? x800 > > ... after a reboot: > > hostname > x800.mydomain.local ? ? ? ? ? ? < OK > > hostname -f > hostname: Unknown host ? ? ? < NOT OK > > dnsdomainname > dnsdomainname: Unknown host ? ? ?< NOT OK > > If I set the hostname manually: > > hostname x800.mydomain.local > > hostname -f > x800.mydomain.local ? ?< OK > > dnsdomainname > mydomain.local ? ?< OK > > Everything is okay ... > > Something I've never experienced before. Does anyone have an idea? > > thx > > -- > ChrisAnother thing about this, postfix fails on startup: Feb 9 00:49:57 x800 postfix[1387]: warning: valid_hostname: invalid character 13(decimal): x800.mydomain.local? Feb 9 00:49:57 x800 postfix[1387]: fatal: unable to use my own hostname Feb 9 00:49:59 x800 postfix/sendmail[1471]: warning: valid_hostname: invalid character 13(decimal): x800.mydomain.local? Feb 9 00:49:59 x800 postfix/sendmail[1471]: fatal: unable to use my own hostname Because some CentOS system file is corrupted? After setting "hostname x800.mydomain.local" postfix starts normally. -- Chris