The Problem "The volume 'boot' has only 0 bytes disk space remaining"

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Question Statement:

After a recent update by Ubuntu 12.04's "Update Manager", I'm getting an alert saying:
The volume "boot" has only 0 bytes disk space remaining

Solutions:

1. To see the current kernel in use:
uname -r

2. To see the usage of the "/boot":
df -h /boot

3. To see all installed kernels:
Type sudo apt-get remove linux-image- and than press Tab twice.

4. Next remove some of the old Kernel, e.g.:
sudo apt-get remove linux-image-3.2.0-27-generic-pae linux-image-3.2.0-29-generic-pae ...
Don't delete all kernels! Only the old ones.

In My case:
There are:
linux-image-3.11.0-15-generic
linux-image-3.11.0-17-generic
linux-image-3.11.0-18-generic
linux-image-3.11.0-19-generic
linux-image-3.11.0-20-generic
linux-image-3.11.0-24-generic
linux-image-3.11.0-26-generic
linux-image-3.13.0-32-generic

I had removed:
linux-image-3.11.0-17-generic
linux-image-3.11.0-18-generic
linux-image-3.11.0-19-generic
linux-image-3.11.0-20-generic
linux-image-3.11.0-24-generic
The alert do not appear again!