Unmet dependencies is a common error occur When you try to install software like Skype or any other software you are trying to install on you Linux Machine , the Error mainly occur due to the dependent package related to the software Skype or any other software which you are trying to install cannot retrieve the package from the Ubuntu repository due to the broken package so the the error message you got is “Unmet dependencies. Try ‘apt-get-f install’ with no packages (or specify a solution)” .so in order to resolve this problem try running the command on terminal window on your Linux machine
Solution 1 : sudo apt-get-f
Solution 2 : sudo apt-get autoclean
&
sudo apt-get -f install && sudo dpkg --configure -a && sudo apt-get -f install