Originally Posted by Radicalz38 View Post

could you try looking at /etc/apt/sources.list.d/ from terminal? If you find some files there could you post the content here?

I wish I could too. There is no way for me to connect toTunnerlier because I can't get into App. Manager to install open SSH. If there is another way which can do with X-terminal, can you show me, please?
Thanks a lot.

Go to the main menu. The place where all the icons are. There you will see an application called "X Terminal"