This past update, I started getting a new error. My /boot mount was full. The problem was that I had 6 or 7 previous kernels still in the mount taking up space.
I was able to fix it with a command written by Linerd. He did a very nice job explaining it, so I would recommend that you follow through and read his post.
To make a long story short, I first ran the trial command:
dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | xargs sudo apt-get --dry-run remove
Then, I ran the full command (without the –dry-run):
dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | xargs sudo apt-get -y purge
Now, I am good to go! Thanks Linerd.