If you are on a LiveCD/USB you need to enable the universe repository as mentioned by Toz.
Then, click on Reload and afterwards close the the application and open a terminal to run apt-get update...
Type: Posts; User: Rubi1200; Keyword(s):
If you are on a LiveCD/USB you need to enable the universe repository as mentioned by Toz.
Then, click on Reload and afterwards close the the application and open a terminal to run apt-get update...