In Ubuntu installation through graphical interface of DEB packages downloaded by the user is a fairly simple and straightforward task but not exactly fast as it is an action that is performed through the Software Center.
the Software Center it is fine to look for programs but it is too much to install a simple DEB package.
Luckily it exists GDebi, A small tool that in the past was responsible for the installation of DEB packages in the distribution of Canonical but unfortunately has been replaced by the Ubuntu Software Center in the latest versions of the operating system. The best thing is that it is still in the repositories and its installation is as simple as opening a console and typing:
sudo apt-get install gdebi
Once GDebi is installed on our system you have to right click on the DEB packages we want to install and select the program so that they are installed using it and not using the Software Center. We will save you the burden of the Software Center and the installation procedure will remain just as simple as before.
More information – Convert RPM files to DEB and vice versa with Package Converter
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