Fix generic Linux installation
Fix generic Linux installation

fixes #39

giabao/vagrant-vbguest,nishaya/vagrant-vbguest,LalatenduMohanty/vagrant-vbguest,dotless-de/vagrant-vbguest,wizonesolutions/vagrant-parallels-tools,roidelapluie/vagrant-vbguest,dotless-de/vagrant-vbguest