Thank you very much all

Please, i would like your help.
Viber is important for many people. Is there any way to be installed?
Because, becoming a root user (sudo -s), normally should had given me the abillity to install any deb package (dpkg -i xxxx.deb). Unfortunatelly, this was not able to be done.

And instead of viber, there is a number of other usefull apps, such as vim, putty, teamviewer etc.

Please, I would like your help.
Thank you

Indeed, sudo -s worked but when trying installing e.g viber.deb via dpkg -i viber.deb, never succedded...

The same happened when e.g apt-get install vim.

So, is there any way to fully take advantage of root permissions, as in an ordinary ubuntu installations?