Setting the Host Name of your server in Linux
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26th o November, 2008
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Checking your Linux host name

First, see if your host name is set correclty using the following commands: 
uname -n
hostname -a
hostname -s
hostname -d
hostname -f
hostname

If the above commands return correctly with no errors then all may be well; however, you may want to read on to verify that all settings are correct.


Configuring /etc/hosts

If your IP address is assigned to you by a DHCP server, then /etc/hosts is configured as follows: 
127.0.0.1	mybox.mydomain.com	localhost.localdomain localhost mybox
If you have a static IP address, then /etc/hosts is configured as follows: 
127.0.0.1	localhost.localdomain localhost
192.168.0.10	mybox.mydomain.com	mybox


Setting the Host Name using "hostname"

After updating the /etc/hosts file correctly, the "hostname" command should be run as follows to set your hostname:

hostname mybox.mydomain.com


Checking /etc/HOSTNAME (if present)

You may or may not have the file /etc/HOSTNAME:

mybox.mydomain.com


Checking /etc/sysconfig/network

If you have a static IP address, then /etc/sysconfig/network is configured as follows: 
NETWORKING=yes
HOSTNAME="mybox.mydomain.com"
...
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