I am using a RasPi 2 running the latest version of Raspbian (as of 12/5/2016).
uname -a
produces this:
Linux raspberrypi 4.4.11-v7+ #888 SMP Mon May 23 20:10:33 BST 2016 armv7l GNU/Linux
Here is the error message produced by the command below:
$ aptitude update; aptitude upgrade
...
...
...
Preconfiguring packages ...
dpkg: unrecoverable fatal error, aborting:
files list file for package `psmisc' contains empty filename
E: Sub-process /usr/bin/dpkg returned an error code (2)
Why is this happening?