I have a problem downloading packages with ubuntu server 18.04. I have had it working before. However, I have reinstalled the operating system and can no longer remember how I fixed it last time. I believe that last time I enabled/downloaded repositories. Can anyone help me?
sudo apt install shorewall Reading package lists... Done Building dependency tree Reading state information... Done Package shorewall 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 'shorewall' has no installation candidate