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Old 02-26-2012, 07:51 AM   #1
pratapsingh
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Registered: Oct 2009
Posts: 22

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Exclamation Hostname command prints nothing a null value


Hi ,

On my box everything works fine. But whenever I run command

Quote:
[root@(none) ~]#/bin/hostname
[root@(none) ~]#
It returns nothing as you see @(none) too.


Quote:
[root@(none) ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain
::1 localhost localhost.localdomain
192.168.144.128 localhost localhost.localdomain

[root@(none) ~]# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME="localhost.localdomain"
[root@(none) ~]#

[root@(none) ~]# printenv | less
HOSTNAME=
SELINUX_ROLE_REQUESTED=
TERM=xterm
SHELL=/bin/bash
HISTSIZE=1000


[root@(none) ~]# which hostname
/bin/hostname
[root@(none) ~]#


[root@(none) ~]# cat /etc/HOSTNAME
127.0.0.1 localhost localhost.localdomain

[root@(none) ~]# /bin/hostname localhost.localdomain
[root@(none) ~]# hostname

[root@(none) ~]#
Its very strange issue I have never noticed on any other system yet.

Any one have any idea about this.

Thank you

Last edited by pratapsingh; 02-26-2012 at 07:54 AM.
 
Old 02-26-2012, 08:25 AM   #2
haveanother
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Registered: Jan 2011
Posts: 13

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Code:
/etc/hostname
Is different from
Code:
/etc/HOSTNAME
since Linux is case-sensitive.

You need the first one of those.

This might contain some useful help too:

Code:
man resolv.conf
Hope this helps
 
Old 02-26-2012, 08:40 AM   #3
pratapsingh
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Registered: Oct 2009
Posts: 22

Original Poster
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I created file /etc/hostname

Quote:
[root@(none) ~]# cp -p /etc/HOSTNAME /etc/hostname
[root@(none) ~]# ll /etc/hostname
-rw-r--r--. 1 root root 45 Feb 20 04:16 /etc/hostname
[root@(none) ~]# cat /etc/hostname
127.0.0.1 localhost localhost.localdomain
Deleted this one /etc/HOSTNAME and rebooted the system too It did not help either

Thanks for your reply
 
Old 02-26-2012, 12:08 PM   #4
haveanother
LQ Newbie
 
Registered: Jan 2011
Posts: 13

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Hey maybe I figured out what you are trying to do.

Here is an article that describes how to change the hostname of a linux system: http://www.ducea.com/2006/08/07/how-...-linux-system/

Code:
127.0.0.1 localhost localhost.localdomain
This is probably not a valid format for /etc/hostname

That format works only for /etc/hosts

These 2 files are completely different ! !



I tried to set my /etc/hostname to the same value as in your example (" 127.0.0.1 localhost localhost.localdomain ").

Code:
# cat /etc/hostname
127.0.0.1 localhost localhost.localdomain
Then I used the example command (from that article that I linked to), to reload the hostname value:

Code:
/etc/init.d/hostname.sh start
And got this response:

Code:
hostname: the specified hostname is invalid
So maybe that is the same problem as you have.

I then changed the /etc/hostname value to this: localhost

Code:
# cat /etc/hostname
localhost
Then tried this command again to reload it:

Code:
/etc/init.d/hostname.sh start
And it was successful. Perhaps this will also work for you.
 
Old 02-27-2012, 11:34 AM   #5
pratapsingh
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Registered: Oct 2009
Posts: 22

Original Poster
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Thanks all for your reply I found the solution and it was nothing with my setting it was due to the rpm package "net-tool". I just upgraded it using yum and it was fixed .

Also I found that file "/bin/hostname" was an empty file.

Thank you
 
Old 02-27-2012, 11:43 AM   #6
EDDY1
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Registered: Mar 2010
Location: Oakland,Ca
Distribution: wins7, Debian wheezy
Posts: 6,838

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http://www.randombugs.com/linux/chan...ux-system.html
 
Old 02-27-2012, 01:17 PM   #7
EDDY1
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Registered: Mar 2010
Location: Oakland,Ca
Distribution: wins7, Debian wheezy
Posts: 6,838

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Can you post the solution to your problem so that others experiencing same problem can benefit from it.
 
  


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