How to modify name of computer or host

[phil]

You need to edit the computer name in two files:

/etc/hostname

and

/etc/hosts

However you may also have other programs that have the hostname 
mentioned in a config file somewhere, for example postfix, amavisd etc 
etc . . .

--
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Regards,
Phil Steel-Wilson               |   [+61](0)447 64 55 34	
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On 07-Aug-15 5:37 AM, Bret Busby wrote:
> Hello.
>
> When the operating system is installed, the person installing the
> operating system, can set or modify the default name for the
> system/host.
>
> I am wondering, when the operating system installation is completed,
> and the system is in use, whether a superuser can modify the name of
> the system/host, and, if so, how it is to be done, for example, at the
> command line prompt, istead of having
> BlackBox:~$
> modifying it to be
> BlackBox-Ubuntu14-04:~$
>
> Years ago (about 20-30years ago), when I was being taught UNIX, I
> remember being taught how to change the command prompt, so it could
> include things such as a timestamp, etc, but, I believe that changing
> the system/host name, would also change the syystem/host name for the
> log in window when the screen is locked, and, in email headers, etc.
>
> Thank you in anticipation.
>
> Thank you in anticipation.
>