p2b@t470:~$ sudo apt-get install perl
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:
 context : Depends: texlive-binaries (>= 2017)
           Depends: texlive-base (>= 2017) but 2015.20160320-1ubuntu0.1 is to be installed
           Depends: texlive-metapost (>= 2017) but 2015.20160320-1ubuntu0.1 is to be installed
           Recommends: fonts-freefont but it is not installable
 dvipng : Depends: texlive-base-bin
 feynmf : Depends: texlive-font-utils but it is not going to be installed
          Depends: texlive-extra-utils but it is not going to be installed
 fragmaster : Depends: texlive-base-bin
              Depends: texlive-extra-utils but it is not going to be installed
              Depends: texlive-font-utils but it is not going to be installed
 latex-cjk-common : Depends: texlive-font-utils (>= 2007.dfsg.2-1) but it is not going to be installed
 libxml-libxml-perl : Depends: perlapi-5.26.1
 perl : Depends: perl-base (= 5.26.1-6ubuntu0.2) but 5.22.1-9ubuntu0.5 is to be installed
        Depends: perl-modules-5.26 (>= 5.26.1-6ubuntu0.2) but it is not going to be installed
        Depends: libperl5.26 (= 5.26.1-6ubuntu0.2) but it is not going to be installed
 tex4ht-common : Depends: texlive-base-bin
                 Recommends: tex4ht
 texlive-base : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-formats-extra : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-games : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-humanities : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-cjk : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-cyrillic : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-czechslovak : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-greek : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-indic : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-japanese : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-korean : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-lang-polish : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-latex-base : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-latex-extra : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-latex-recommended : Depends: texlive-binaries (>= 2015.20160222.37495-1)
                             Recommends: prosper (>= 1.00.4+cvs.2006.10.22) but it is not going to be installed
 texlive-luatex : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-math-extra : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-metapost : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-music : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-pictures : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-pstricks : Depends: texlive-binaries (>= 2015.20160222.37495-1)
                    Recommends: texlive-font-utils but it is not going to be installed
                    Recommends: texlive-extra-utils but it is not going to be installed
 texlive-science : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 texlive-xetex : Depends: texlive-binaries (>= 2015.20160222.37495-1)
 tipa : Depends: texlive-base-bin
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).