Maybe I'm beating a dead horse but I think the page will be extremely useful for someone who wants to secure their wallet but doesn't have any experience with Ubuntu. http://startbitcoin.com/how-to-create-a-secure-bitcoin-wallet/
It has detailed instructions for:
Creating a bootable Thumb Drive
Booting Ubuntu from a thumb drive
Setting up your network once you are in Ubuntu
Getting the initial bitcoin config including wallet.dat
Showing hidden files in Ubuntu
Copying your wallet.dat file to a thumb drive
Using that wallet later
I have included screenshots for you visual learners.
I am always looking for and receptive to feedback. Anything helps.
I put a lot of work into it so if you find it makes life easier for you, please donate - 1HbdRpinMDQ2cgUWsKiMPDN2icC8rNpS1i