So I downloaded Ubuntu 12.10 on a Dell mini Inspiron 910. Had problems with wifi, but I bought a wireless adapter and so I fixed that. But when I try installing flash, with sudo apt-get install flashplugin-installer gsfonts-x11 it gives me:

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Package gsfonts-x11 is not available, but is referred to by another package.

This may mean that the package is missing, has been obsoleted, or

is only available from another source



E: Unable to locate package flashplugin-installer

E: Package 'gsfonts-x11' has no installation candidate

which I don't really understand.