Broken software dependencies are often caused by incompatible third party repositories.
I am asked to provide a list of software sources (also known as software repositories). How can I quickly get a list of software sources?
Software repositories as used for
It will provide all useful information regarding software repositories used by
To post this list on Askubuntu, go to http://paste.ubuntu.com/ and paste the list in the big text field. Submit the form by pressing "Paste!" and copy the URL from the location bar (which should look like "http://paste.ubuntu.com/566454/"). Finally, paste this URL in your question.
If you want a gui its settings in the update manager or software sources in the software centre and in synaptic package manager its called repositories.