With both issues, I see what you've copies seems to mention and E: drive and a W: drive.
E: and W: are not referring to drives at all, this is Linux NOT Windows!
The lines of text with 'E:' at the start are error messages. The ones with 'W:' at the start are warnings! Although personally I fail to see any difference, the warnings are still error messages aren't they?! heh heh!I believe you might be running Ubuntu from a Live CD. Live CDs are generally for short trials and not actual use.
What do you mean 'not actual use'? Of course live CDs can be used!
For example:
I have a really old desktop PC at home with no hard-drive, which does not support booting from USB. Rather than throw it away, I boot it with live CDs (Tiny core, lUbuntu, Puppy etc. Basically anything that comes to hand!). Any documents we need to save are saved to a USB memory stick. So it's kinda like a kiosk. Our daughter uses it a lot with a Qimo liveCD (lightweight Xubuntu based distro aimed at kids).
It also comes in handy as a fallback when she's hogging one of our laptops. So my wife or I can get online and do internet shopping/banking. And because it's a live CD and everything is stored in RAM, no traces of any transactions are stored on the PC. So once the PC's shut down any information like that is gone for good! And there's absolutely no way that any of my kids can damage the operating system either (other than removing or damaging the Live CD). And the simple fix in that case is to burn another CD!
I know this is probably a pretty exceptional case, but live CD's can be used for more than just test-driving a distro, or installing a working system. They can be used for day to day usage!
Going back on topic...@ OP:
From your posted output, it looks like Aptitude is saying that it cannot resolve the server names for the Ubuntu repositories and that it cannot download the package lists. Which indicates that there is most likely a problem with your network/internet connection. So you might want to check your connections.
e.g.
If you're using wireless, you might want to check that your wireless card is supported and is working with the default Ubuntu/Linux drivers. You might also want to check the network manager to ensure that you are connected correctly to your router (correct WPA key etc.).
If the wireless card is not supported or not working, or if you're having problems connecting wirelessly, you might want to consider connecting to your router via a wired connection (which should connect you automatically) and then try 'sudo apt-get update' again before looking for an appropriate wireless driver and doing whatever else you want to do.
Regarding Gnome 3 in Ubuntu 11.04. I don't think the full version of Gnome 3 is in the main repositories ATM. I think there's a preview/demo/testing version in there. I think the best way to install Gnome 3 is via a PPA.
You should also note that after installing Gnome 3, if you decide you don't want it any more; removing it is NOT easy. In fact it's a real ball-ache. It's probably much quicker and easier to completely re-install Ubuntu than it is to fully remove Gnome 3!
Anyway, to install Gnome 3 via a ppa, this is what I used when I was trying it on Ubuntu 11.04: (official Gnome 3 ppa)
sudo add-apt-repository ppa:gnome3-team/gnome3
sudo apt-get update
sudo apt-get dist upgrade -f
sudo apt-get install gnome-shell
From a fresh install of Ubuntu, I'd recommend sorting out your connection problems, then use the update manager to get any important system updates before attempting to install Gnome3 from the ppa!
