sudo apt-get install samba

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an
impossible situation or if you are using the unstable distribution that some
required packages have not yet been created or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  samba : Depends: samba-common (= 2:4.1.6+dfsg-1ubuntu2) but 2:4.1.6+dfsg-1ubuntu2.14.04.2 is to be installed
  Depends: samba-common-bin (= 2:4.1.6+dfsg-1ubuntu2) but 2:4.1.6+dfsg-1ubuntu2.14.04.2 is to be installed
  Depends: samba-dsdb-modules but it is not going to be installed
  Depends: samba-libs (= 2:4.1.6+dfsg-1ubuntu2) but 2:4.1.6+dfsg-1ubuntu2.14.04.2 is to be installed
  Recommends: attr but it is not going to be installed
  Recommends: samba-vfs-modules but it is not going to be installed
E: Unable to correct problems, you have held broken packages.