Perfect Server Installing software

using apt-get install I get a return of "???? has not installation candidate"

What do I need to do to correct this?

 

on which package? what distro?

 

Are you just typing apt-get install ??????????????

or are you typing apt-get install rsnapshot
something like that?

If you have nothing after "apt-get install" then it does not know what it is suppose to install.