fix several issues with ubuntu install script
fix several issues with ubuntu install script

dirkmueller/crowbar,rsalevsky/crowbar,rsalevsky/crowbar,aspiers/crowbar,MaximilianMeister/crowbar,nkrinner/crowbar,rhafer/crowbar,dirkmueller/crowbar,aspiers/crowbar,rhafer/crowbar,SUSE-Cloud/crowbar,vwallfahrer/crowbar,vwallfahrer/crowbar,tserong/crowbar,nkrinner/crowbar,mmnelemane/crowbar,tserong/crowbar,rhafer/crowbar,MaximilianMeister/crowbar,mmnelemane/crowbar,toabctl/crowbar,aplanas/crowbar,crowbar/crowbar,aplanas/crowbar,SUSE-Cloud/crowbar,crowbar/crowbar,toabctl/crowbar