From what I'm reading, I don't think that you have removed the swap partition. Getting the swap partition's UUID is easy by typing in a terminal:
blkid. One of the lines should contain the word
swap. That line should look something like this:
/dev/sda5: UUID="e911d747-0add-49dc-a37d-7b6b16656c2f" TYPE="swap"
/etc/fstab by typing in the terminal:
sudo gedit /etc/fstab. Add a line saying:
UUID=swap's-uuid-number none swap sw 0 0
So, in my case, it should be:
UUID=e911d747-0add-49dc-a37d-7b6b16656c2f none swap sw 0 0
Save the file, reboot. You should have your swap partition mounted automatically again.
blkid doesn't show a swap partition, you should create a new one. I'd advice you to do that via the tool
gparted. Install it via
sudo apt-get install gparted or via the Software Center, then run it. In
gparted, select an unused area, then click on the new partition button (it looks like a document with a green plus sing on it), and make sure you format it as
swap, can't really remember what it's called again. A good swap partition should be 2 times the size of your RAM. So if you've got 2GB of RAM, make sure that your swap partition's size is 4GB. When you've done that,
blkid should show have a line containing
swap. Continue using the instructions above.