pooja@pooja-Inspiron-N5050:~$ sudo apt-get install software-center
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 openjdk-6-jre-headless : Depends: openjdk-6-jre-lib (>= 6b30-1.13.1-1ubuntu2~0.12.04.1) but 6b27-1.12.6-1ubuntu0.12.04.4 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
pooja@pooja-Inspiron-N5050:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libmp3lame0 libsidplay1 libopencore-amrnb0 gprolog-doc libopencore-amrwb0
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  icedtea-6-jre-cacao icedtea-6-jre-jamvm openjdk-6-jre-headless
  openjdk-6-jre-lib
Suggested packages:
  sun-java6-fonts ttf-dejavu-extra fonts-ipafont-gothic fonts-ipafont-mincho
The following packages will be upgraded:
  icedtea-6-jre-cacao icedtea-6-jre-jamvm openjdk-6-jre-headless
  openjdk-6-jre-lib
4 upgraded, 0 newly installed, 0 to remove and 706 not upgraded.
5 not fully installed or removed.
Need to get 0 B/40.2 MB of archives.
After this operation, 1,152 kB disk space will be freed.
Do you want to continue [Y/n]? Y
WARNING: The following packages cannot be authenticated!
  icedtea-6-jre-cacao openjdk-6-jre-lib icedtea-6-jre-jamvm
  openjdk-6-jre-headless
Install these packages without verification [y/N]? y
dpkg: dependency problems prevent configuration of openjdk-6-jre-headless:
 openjdk-6-jre-headless depends on openjdk-6-jre-lib (>= 6b30-1.13.1-1ubuntu2~0.12.04.1); however:
  Version of openjdk-6-jre-lib on system is 6b27-1.12.6-1ubuntu0.12.04.4.
dpkg: error processing openjdk-6-jre-headless (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                          dpkg: dependency problems prevent configuration of openjdk-6-jre-lib:
 openjdk-6-jre-lib depends on openjdk-6-jre-headless (>= 6b17); however:
  Package openjdk-6-jre-headless is not configured yet.
dpkg: error processing openjdk-6-jre-lib (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of icedtea-6-jre-cacao:
 icedtea-6-jre-cacao depends on openjdk-6-jre-headless (= 6b30-1.13.1-1ubuntu2~0.12.04.1); however:
  Package openjdk-6-jre-headless is not configured yet.
dpkg: error processing icedtea-6-jre-cacao (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of icedtea-6-jre-jamvm:
 icedtea-6-jre-jamvm depends on openjdk-6-jre-headless (= 6b30-1.13.1-1ubuntu2~0.12.04.1); however:
No apport report written because the error message indicates its a followup error from a previous failure.
                          No apport report written because the error message indicates its a followup error from a previous failure.
                                                      Package openjdk-6-jre-headless is not configured yet.
dpkg: error processing icedtea-6-jre-jamvm (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ca-certificates-java:
 ca-certificates-java depends on openjdk-6-jre-headless (>= 6b16-1.6.1-2) | java6-runtime-headless; however:
  Package openjdk-6-jre-headless is not configured yet.
  Package java6-runtime-headless is not installed.No apport report written because MaxReports is reached already

  Package openjdk-6-jre-headless which provides java6-runtime-headless is not configured yet.
dpkg: error processing ca-certificates-java (--configure):
 dependency problems - leaving unconfigured
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 openjdk-6-jre-headless
 openjdk-6-jre-lib
 icedtea-6-jre-cacao
 icedtea-6-jre-jamvm
 ca-certificates-java
E: Sub-process /usr/bin/dpkg returned an error code (1)