Tente ao invés disso
sudo dpkg -i skype-ubuntu*.deb Agora deve funcionar sem nenhum erro.
sudo dpkg - skype-ubuntu*.deb
[sudo] password for user:
dpkg: error: need an action option
Type dpkg --help for help about installing and deinstalling packages [*];
Use 'dselect' or 'aptitude' for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Options marked [*] produce a lot of output - pipe it through 'less' or 'more' !
Eu recebi essa saída ao tentar instalar o Skype no Ubuntu 13.04.
Tente ao invés disso
sudo dpkg -i skype-ubuntu*.deb Agora deve funcionar sem nenhum erro.