I can't install the Software Center [duplicate]

I can't install the Software Center:

billy2xs@billy2xs-W150ER:~$ sudo apt-get install software-center
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package software-center 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 'software-center' has no installation candidate

I also tried:

sudo apt-get install software-properties-common

and got

software-properties-common is already the newest version (0.98.9.5).

so I'm lost.

Solution 1:

Assuming by Software-center, you mean the gnome-software-center. You can install it via this command:-

sudo apt-get install gnome-software