I am new to Ubuntu and I have some weird problem. I am trying to install a package called ckan. When I run the command sudo apt-get ckan, I have always the same answer : 'Unable to locate the package'. In fact, I notice I have the same problem with any package.
In the 'sources.list' file in the /etc/apt/ folder I have the following information. I tried to update, but the problem still remains the same
deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin...]
deb http://archive.ubuntu.com/ubuntu/ precise main restricted
deb http://archive.ubuntu.com/ubuntu/ precise-security main restricted
deb http://archive.ubuntu.com/ubuntu/ precise-updates main restricted
Could anyone help?