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HOWTO To Change The Hostname
26/07/08
11:02:47 am, by richard 
, 160 words 
Categories: Ubuntu Linux, OS and Systems Administration, Network and Connectivity, Installation and Configuration
HOWTO To Change The Hostname
So for whatever reason you need to change the hostname of your Ubuntu Linux machine. For me this is usually because I am playing around with a copy of a Vmware machine and well its needs a unique name. 
Follow up:
Check your host name is set to something and no errors are returned. The commands below will return the haost name with an without the domain.
uname -a
uname -n
hostname -a
hostname -f
uname -n
hostname -a
hostname -f
Make backup copies of the two files, just in case
cd /etc
cp hosts hosts.bak
cp hostname hostname.bak
cp hosts hosts.bak
cp hostname hostname.bak
Sort out the /etc/hosts file so that the new name is reflected in that file
127.0.0.1 localhost
127.0.1.1 newhostname.example.com newhostname
127.0.1.1 newhostname.example.com newhostname
Update the hostname file so that it reflects the new name.
Edit /etc/hostname
sudo nano /etc/hostname
sudo reboot
Once the machine has rebooted use check that the new name is set correctly
uname -a
uname -n
hostname -a
hostname -f
uname -n
hostname -a
hostname -f
There you go all done!
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