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Choose Menu System->Administration->Users and Groups

I am able to see my Users Settings as follows:

User name: mike

Then why I still see the following prompt line?

user@ubuntu:~$ echo $USER

I expect to see the following

mike@ubuntu:~$ echo $USER

If my understanding is wrong, then how can I change it in this way?

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migrated from Sep 22 '11 at 17:31

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Did you logout and login again? – Fred Foo Sep 22 '11 at 14:40
@larsmans, yes, I did. But it doesn't work. – q0987 Sep 22 '11 at 14:43

I think the name mike is stored in Gnome, and not visible in the whole system.

Your real system name is user. Take a look at this to change your username.

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