apt-get: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution)

Question

root@m-laptop:/home/m/Desktop# apt-get -f install libc6
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libc6 is already the newest version.
libc6 set to manually installed.
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  virtualbox-4.1: Depends: libc6 (>= 2.11) but 2.9-4ubuntu6 is to be installed
                  Depends: libcurl3 (>= 7.16.2-1) but it is not installable
                  Depends: libpython2.7 (>= 2.7) but it is not installable
                  Depends: libqt4-network (>= 4:4.5.3) but it is not installable
                  Depends: libqt4-opengl (>= 4:4.7.2) but it is not installable
                  Depends: libqtcore4 (>= 4:4.7.0~beta1) but it is not installable
                  Depends: libqtgui4 (>= 4:4.7.0~beta1) but it is not installable
                  Depends: libssl1.0.0 (>= 1.0.0) but it is not installable
                  Depends: libstdc++6 (>= 4.6) but 4.3.3-5ubuntu4 is to be installed
                  Depends: libxml2 (>= 2.7.4) but 2.6.32.dfsg-5ubuntu4 is to be installed
                  Recommends: libsdl-ttf2.0-0 but it is not installable
                  Recommends: dkms but it is not installable
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
root@m-laptop:/home/m/Desktop# 

I ran the command earlier as : dpkg -i virtualbox-4.1_4.1.18-78361_Ubuntu_oneiric_i386.deb and was trying to install vbox in 9.04

Answer 1

It looks like you are using Ubuntu 9.04 "Jaunty Jackalope" (which isn't supported any more) and you have tried to install the package virtualbox-4.1 that requires at least Ubuntu 10.04.

Remove the package and upgrade your system.