Is there any way to create an updated iso of my installed ubuntu so that I don't need to update next time I have to have a fresh instal.
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If you're not changing architecture (32-bit to 64-bit or vice versa) you can just back up /var/cache/apt/archives, restore it to the new machine and run
sudo apt-get update
That'll get all the applications migrated so you don't have to download them but it won't install them for you.
Better yet, try this-
dpkg --get-selections > installed-programs.log
That will dump a list of your currently installed applications to a text file. You can then move the file to the new machine and do
sudo dpkg --set-selections < installed-programs.log
then do
sudo apt-get dselect-upgrade
to install the packages.
