[ubuntu] Not installing any software

I installed some software on my machine and since then it refuses to install other here is the error I get below,

apt-get install vlc
Reading package lists... Done
Building dependency tree
Reading state information... Done
vlc is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
git-core : Depends: liberror-perl but it is not going to be installed
Recommends: curl but it is not going to be installed
libdigest-sha1-perl : Depends: perlapi-5.10.1 but it is not installable
libperl5.14 : Depends: perl-base (= 5.14.2-6ubuntu2.1) but 5.14.2-13 is to be installed
perl : Depends: perl-base (= 5.14.2-6ubuntu2.1) but 5.14.2-13 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).