Re: boot space error on update
If you are still running 10.04 and have never removed old kernels, you could have more than a dozen old ones lying around doing nothing. How many kernel versions are listed in your grub menu?
I have an old 10.04 system I do not run much and had not cleaned house lately, and it had a total of 13 kernels. So I removed 10 of them leaving the 3 most recent.
If you do not trust a script to make sure it does it right, you can do it yourself.
Assuming you are booting the most recent kernel you do have, to find out its version in a terminal do: uname -r
Go to Administration > Synaptic and enter linux in Quick search. Scroll through the list and any green boxes in any linux-generic, linux-headers, or linux-image more than several versions older than you are running as "Mark for complete removal". When you get them all Apply. Note that files for kernel versions are not necessarily in numerical order, and do not remove other files common to all linux versions.
For example my 10.04 is running 2.6.32-42, so I removed linux header, image or generic files from 2.6.32-39 or earlier. Now grub only shows 3 kernels -40, -41, and -42.
i5 650 3.2 GHz, 8 GB, nvidia GTX 750 Ti, 32" 1080p | i7-4700MQ, 8 GB, Intel HD 4600/nvidia GTX 765M, 15.6" 1080p | etc.