How do I change HOSTNAME on an Ubuntu server?

Posted by BryanWheelock on Server Fault See other posts from Server Fault or by BryanWheelock
Published on 2011-07-01T13:11:14Z Indexed on 2011/07/01 16:24 UTC
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ubuntu

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hostname

I'm attempting to change the hostname on my shared server with Slicehost so I can setup Postfix as a null client.

I edited /etc/hosts
and after reboot, the hostname is still incorrect.
What am I doing wrong?

username@mail Fri Jul 01 13:01:32 ~   
$ sudo cat /etc/hostname  
mail.domain1.com  

username@mail Fri Jul 01 13:01:45 ~   
$ cat /etc/hosts  
127.0.0.1     localhost localhost.localdomain  
208.78.100.198  mail.domain1.com   

username@mail Fri Jul 01 13:02:13 ~   
$ hostname -f  
pop.where.secureserver.net

I also intend to add another domain to this server, how do I configure this correctly.

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