Hi. I have a Vaio laptop with default OS being Windows 7.I have purchased (as an option) the recovery disk (7 disks) from Sony. Recently installed Ubuntu 13 and Grub onto ssd as a side-by-side install. No problems there. However when I downloaded and installed Comodo AV for linux(yes the version for both Ubuntu and x64). I don't remember and can't find instructions on what to type after "SUDO" to bring up Password Box for post-installation to continue. I used UBUNTU before as a live distro on another laptop which is Fujitsu N6420 with XP x86 . That computer did come with a recovery disk (1 total,LOL) that I've used 48 times! I possess that one still and use it once a week. Found great software that keeps it cleaned up and optimized. It's three generations older and runs great. Also I have the latest Knoppix installed on a 128gig flash drive. Yet it's only using 15gigs and wants to cram everything into smaller spaces. I'm trying to figure this one out still. When I use "disk usage" app, I see a whole lot of RED! I've helped myself and others by being able to access Windows after boot problems or hd problems and been able to access and recover things. I even successfully deleted some Malware without have to bother Comodo Geek Buddy.Couldn't get through and yes I'm a paid customer of theirs" They are both really smart and nice folks! So, to conclude, I need advice on what to add in "COMMAND window" after typing "SUDO" to get password box to come up! If you have any idea on fixing space issue with KNOPPIX on flash disk that would be nice. Thanks, Have a great day!

Type sudo-space-command. For instance, if you want to edit the sudoers file, you would type sudo visudoers. Ubuntu will then ask for your password.