aruns ~ $ sudo apt-get --reinstall install python-virtualenv
[sudo] password for aruns: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libcuda1-331-updates linux-headers-3.16.0-30 linux-headers-3.16.0-30-generic
  linux-image-3.16.0-30-generic linux-image-extra-3.16.0-30-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 178 not upgraded.
1 not fully installed or removed.
Need to get 0 B/1,485 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 626189 files and directories currently installed.)
Preparing to unpack .../python-virtualenv_1.11.4-1_all.deb ...
Unpacking python-virtualenv (1.11.4-1) over (1.11.4-1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Setting up ntop (3:5.0.1+dfsg1-2ubuntu1) ...
/var/lib/dpkg/info/ntop.config: 3: /var/lib/ntop/init.cfg: Syntax error: Unterminated quoted string
dpkg: error processing package ntop (--configure):
 subprocess installed post-installation script returned error exit status 2
Setting up python-virtualenv (1.11.4-1) ...
Errors were encountered while processing:
 ntop
E: Sub-process /usr/bin/dpkg returned an error code (1)