Changed name to root user, Cannot do the same with terminal username

[macuser111888]

Hello ...
I'm very new to Mac...
I had an user on my mac which I changed (just the name of it), then subsequently it led me to change the whole Apple id, so I went on to having a brand new everything after entering some info about birthdays and all that stuff.
After doing all this, I pulled up the terminal and it shows the old username, just like
"OldUserName:~NewUserName$"
So How Can I change this so that the old user disappears and only new stays ?
Thanks in Advance

 

[flaubert]

First point: while you may have done this on a MacBook Air, the problem you're posting about is general enough that it should be posted in a more appropriate sub-forum (such as the Mac Basics, Help, and Buying Advice sub-forum).

Second, I think we're going to need to know a bit more about how exactly you changed the name of the user. I can think of some ways to do that, but they're pretty technically involved to do it properly, and it's clear that whatever method you employed left behind some artifacts of the old user name, or more likely didn't really happen at all.

I think I can, however, parse what the Terminal is telling you with this: "OldUserName:~NewUserName$"

The part in front of the colon is what Terminal thinks is the user who is logged in, which suggests that you haven't really changed the name of the user, you've probably changed something else. The part of the string after the colon is what directory is currently active, which suggests that you're in a subdirectory named NewUserName under the home directory (abbreviated with ~) of the true user.

You might want to go into the Users pane of System Preferences and see what users are actually present. I kind of suspect that your old user will be present in the list still; you might see the new user there, too.

 

[ghanwani]

Hello ...
I'm very new to Mac...
I had an user on my mac which I changed (just the name of it), then subsequently it led me to change the whole Apple id, so I went on to having a brand new everything after entering some info about birthdays and all that stuff.
After doing all this, I pulled up the terminal and it shows the old username, just like
"OldUserName:~NewUserName$"
So How Can I change this so that the old user disappears and only new stays ?
Thanks in Advance

Actually the "OldUserName" above is probably the name given to the computer.

Follow these instructions to change that.

How to Change Your Computer Name on Mac OS X

When you’re sharing stuff back and forth between your computers, the names of those computers actually start to matter — in my case, I upgraded to a new MacBook Air because my old one has a dead screen and is out of warranty, so I made it into a desktop with an external monitor. That’s when I...

www.howtogeek.com

 

[macuser111888]

Actually the "OldUserName" above is probably the name given to the computer.

Follow these instructions to change that.

How to Change Your Computer Name on Mac OS X

When you’re sharing stuff back and forth between your computers, the names of those computers actually start to matter — in my case, I upgraded to a new MacBook Air because my old one has a dead screen and is out of warranty, so I made it into a desktop with an external monitor. That’s when I...

www.howtogeek.com

That worked !!
You helped me a lot
Thank You user ghanwani

 

[flaubert]

Apologies, ghanwani has it right, the first part is the computer name, second part is home directory of new user.