Table of Contents:

Brief #2 - Change Mac name(s) with scutil

macos
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Intro

This one will show you (and future me) how to change the name of my Mac quickly on the Terminal.

We user the command line utility that comes built-in macOS scutil.

scutil – Manage system configuration parameters

The How-To

The relevant portion of man scutil says:

--get pref
    Retrieves the specified preference.  The current value will be
    reported on standard output.

    Supported preferences include:

          ComputerName   The user-friendly name for the system.

          LocalHostName  The local (Bonjour) host name.

          HostName       The name associated with hostname(1) and
                         gethostname(3).

--set pref [newval]
    Updates the specified preference with the new value.  If the new
    value is not specified on the command line then it will be read from
    standard input.

    Supported preferences include: ComputerName LocalHostName HostName

    The --set option requires super-user access.

With this we can change our Mac name(s) like so:

sudo scutil --set ComputerName MyAwesomeMac
sudo scutil --set LocalHostName MyAwesomeMac
sudo scutil --set HostName MyAwesomeMac

Conclusion

This one is an extremely short one. But quite useful for copy & paste.

Bonus
For NetBIOS Networks (like WIN based networks; AD and the sorts) you can change the NetBIOS name like so:
sudo defaults write \
     /Library/Preferences/SystemConfiguration/com.apple.smb.server \
     NetBIOSName MyAwesomeMac