apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  gdm
Suggested packages:
  uswsusp gnome-mag gnome-orca gok
The following NEW packages will be installed:
  gdm
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
Need to get 0 B/1.731 kB of archives.
After this operation, 6.968 kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Paketler önyapılandırılıyor ...
(Reading database ... 207612 files and directories currently installed.)
Unpacking gdm (from .../gdm_3.0.4-0ubuntu15_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/gdm_3.0.4-0ubuntu15_i386.deb (--unpack):
 trying to overwrite '/usr/share/pixmaps/nobody.png', which is also in package mdm 1.0.4
No apport report written because MaxReports is reached already
                                                              dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Processing triggers for hicolor-icon-theme ...
Errors were encountered while processing:
 /var/cache/apt/archives/gdm_3.0.4-0ubuntu15_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)