The following NEW packages will be installed:
  ruby-rdoc
The following partially installed packages will be configured:
  foreman-installer ruby-kafo ruby-kafo-parsers
0 packages upgraded, 1 newly installed, 0 to remove and 40 not upgraded.
Need to get 0 B/230 kB of archives. After unpacking 903 kB will be used.
(Reading database ... 55898 files and directories currently installed.)
Preparing to unpack .../ruby-rdoc_3.12.2-1_all.deb ...
Unpacking ruby-rdoc (3.12.2-1) ...
dpkg: error processing archive /var/cache/apt/archives/ruby-rdoc_3.12.2-1_all.deb (--unpack):
 trying to overwrite '/usr/bin/rdoc', which is also in package ruby 1:1.9.3.4
Errors were encountered while processing:
 /var/cache/apt/archives/ruby-rdoc_3.12.2-1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
dpkg: dependency problems prevent configuration of ruby-kafo-parsers:
 ruby-kafo-parsers depends on ruby-rdoc (>= 3.12.0); however:
  Package ruby-rdoc is not installed.

dpkg: error processing package ruby-kafo-parsers (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ruby-kafo:
 ruby-kafo depends on ruby-kafo-parsers; however:
  Package ruby-kafo-parsers is not configured yet.

dpkg: error processing package ruby-kafo (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of foreman-installer:
 foreman-installer depends on ruby-kafo (>= 0.4.0); however:
  Package ruby-kafo is not configured yet.

dpkg: error processing package foreman-installer (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 ruby-kafo-parsers
 ruby-kafo
 foreman-installer