I want to know what packages needs to be install for a particular command to run.like to run clear command a package name ncurses is needed.I knew a site which used to tell the package name for all Distro of linux but I couldn't remember anymore .Can somebody mention the site/s.I was very simple site enter the command and hit search. It would show distros along the package you need to install side by side. It would be very helpful and thank you