Q:

What does apt's "failed in buffer_write(fd)" error message mean?

I have a server and am trying to do an apt-get upgrade, and get the following error message. What does it mean?
E: /var/cache/apt/archives/linux-ubuntu-modules-2.6.24-27-generic_2.6.24-27.45_i386.deb: failed in buffer_write(fd) (10, ret=-1)

A:

Seems that your disk (or /var/apt partition) is full, try to free some space.

