I was wondering is itpossible and how could one save a document or/and application onto a Live Ubuntu USB? I am on MacBook Air running OS X 10.8.5 I installed Ubuntu onto my USB using unetbootin.
Thank you in advance!
What you're wanting is a persistent USB. This page will walk you through the steps to set it up correctly.
EDIT
Boot into your Mac, plug your USB drive in, open the drive and open the file /boot/grub/grub.cfg
You should see an entry such as
menuentry "Try Ubuntu without installing" {
a little further down you should see something like:
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
if you add the word "persisitent"
after "casper"
and before "quiet"
you should be able to boot and have persistence!
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper persistent quiet splash --