how do i install an app from consol Help!

[donaldfarkas]

donald@pengdon:~$ sudo apt-get install libdvdcss2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libdvdcss2 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: Package libdvdcss2 has no installation candidate

the reason im trying to install this file is because k9copy keeps crashing on me and i googled it and they said this might fix problem

[reed9]

libdvdcss2 is in a 3rd party repo called medibuntu. It is not maintained by the Ubuntu folk. So you need to add that to your repos.
https://help.ubuntu.com/community/Medibuntu

Alternatively, to install it you can do (9.04 and above only)

sudo apt-get install libdvdread4
sudo /usr/share/doc/libdvdread4/install-css.sh/

[daark.child]

That error means that the package is not available in the repositories configured on your system. It should be available in the Medibuntu repository.