I am currently very frustrated with 17.10; I am unable to install Opera browser or google chrome because unsupported ... via Ubuntu Software or Terminal using apt-get install DEB file such as "/Downloads/opera-stable_48.0.2685.50_amd64" ... any other suggestions? It was not this complicated in 17.04 or before versions. If this continues, I might go back to just using windows.
-No message on Ubuntu Software ... It does not allow "Install" even after authentication with my password. -On Terminal states unsupported: "E: Unsupported file /Downloads/opera-stable_48.0.2685.50_amd64 given on commandline"
And yes, downloaded the DEB files of opera and google chrome ... in my download folder and extracted to unlock.
Fixed ... closed. It needed: sudo apt-get install ubuntu-restricted-extras
Now functioning normal. Thank you all for the help and suggestions. Please note I am new to this Operating system and learning ... don't take my questions the wrong way. All the best.