How do I delete programs using terminel
 

I just got my Ubuntu 14.04 running just the way I want it, when I decided to install Opera browser. I tried 3 different times and failed each time. I need some one to tell me what to type in the terminal to remove any and all files related to Opera.

if that doesn't work:
If you still find opera, use your menu editor to find out how opera is called, and delete it from there if that is worth it to you.

here is what happened:

don@don-500-101l:~$ sudo apt-get --purge remove opera
[sudo] password for don:
Reading package lists... Done
Building dependency tree
Reading state information... Done
N: Ignoring file 'opera.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'opera.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Unable to locate package opera
don@don-500-101l:~$ sudo dpkg -r opera
dpkg: warning: ignoring request to remove opera which isn't installed
don@don-500-101l:~$ sudo rm -rf ~/.opera
don@don-500-101l:~$

As for using the menu editor I am a NEW-BEE I have no idea what that is or how to open one or use one.

The filename should be opera.list & opera.list.save instead of opera.listsudo that's why it is giving error and you are not able to install opera
To remove first command error, run
Now run
To install opera
Run

Method - II for installation
You can install it from ubuntu software center, if you are not able to find opera there

Method - III for installation
There is another easier method.
Download opera deb file from here
Now run following command
# sudo apt-get install gdebi
Now right click on downloaded deb file and open with Gdebi package installer.
Now opera should be installed.

As you can see, nothing happened. After line of type I pushed enter.

don@don-500-101l:~$ # sudo rm -rf /etc/apt/sources.list.d/opera*
don@don-500-101l:~$ open
Couldn't get a file descriptor referring to the console
don@don-500-101l:~$ sudo apt-get --purge remove opera
[sudo] password for don:
Reading package lists... Done
Building dependency tree
Reading state information... Done
N: Ignoring file 'opera.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'opera.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Unable to locate package opera
don@don-500-101l:~$ sudo sh -c 'echo "deb http://deb.opera.com/opera/ stable non-free" >> /etc/apt/sources.list.d/opera.list
> sudo sh -c 'wget -O - http://deb.opera.com/archive.key | apt-key add -'
> sudo apt-get update
> sudo apt-get install opera
>

Do not add hash before the command. The command should be
same for method III

On the last go around I copy/past the whole thing. Lets start over from the beginning.

I did as you suggested and now Opera is installed. Thanks for your help.