I once wanted to install some utilities on the running LiveCD with Ubuntu Desktop, the same MC, etc., which did not want to be installed.
To solve this problem, you need to include the “Universe” repository.
And so, add it:
sudo add-apt-repository universe
In older versions of Ubuntu, you might have to add another command:
sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) universe"
If desired, you can include all the repositories:
sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe multiverse restricted"
And update the list of packages:
sudo apt-get update
After that, everything was install successfully.
Above $(lsb_release -sc) specifies the version of Ubuntu and inserts it into the link.
You can also manually check the version by running the command:
lsb_release -sc