How do I get rid of "linux-ev4u.site"?

What exactly is this “linux-ev4u.site”?
I downloaded openSuse from the official website, and I have linux-ev4u.site everywhere.
When I start the computer, it says “Welcome to linux-ev4u.site”.
When I click on start, it says linux-ev4u.site beside my username:
http://s14.postimg.org/6im0xxhzl/snapshot4.jpg

When I open a terminal, it again says linux-ev4u:
http://s29.postimg.org/8ec10rmo7/snapshot5.jpg

I want to get rid of linux-ev4u.site, and replace it with openSuse.
I want it to say <username> on openSuse in the start menu.
I want it to say “Welcome to openSuse” on the login screen.
I want it to say <username>@openSuse in the terminal.
How do I do this?
Thanks…

It’s a randomly generated hostname + domain or acquired from your DHCP server.

YAST -> Network Devices -> Network Settings -> Hostname/DNS -> Give your system a new hostname and remove checkmark from “Change Hostname via DHCP”

It worked!
Thank you, I couldn’t have figured this out in a million years without your help :slight_smile: