Não é possível instalar nenhum software via apt-get install

Question

Eu tentei instalar flex e yacc na minha máquina Ubuntu.

sudo apt-get install byacc flex

Eu recebo este erro:

    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:
     flex : Depends: m4
            Depends: libfl-dev (= 2.5.35-10ubuntu3) but it is not going to be installed
     virtualbox-4.2:i386 : Depends: libpython2.7:i386 (>= 2.7) but it is not going to be installed
                           Depends: libxml2:i386 (>= 2.7.4) but it is not going to be installed
                           Depends: psmisc:i386 but it is not going to be installed
                           Recommends: libsdl-ttf2.0-0:i386 but it is not going to be installed
                           Recommends: dkms:i386 but it is not installable
                           Recommends: linux-headers:i386
                           Recommends: gcc:i386 but it is not going to be installed
                           Recommends: make:i386 but it is not going to be installed
                           Recommends: binutils:i386 but it is not going to be installed
                           Recommends: pdf-viewer:i386
                           Recommends: python-central:i386 but it is not installable
    E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

Por que não consigo instalar nenhum pacote de software usando o comando apt-get ?

    

Answer 1

Parece um problema com dependências quebradas em seu sistema, talvez devido a uma instalação interrompida anterior (virtualbox-4.2: i386?). Na saída, você tem uma solução possível:

sudo apt-get -f install

É o primeiro passo lógico e mais seguro, isto tentará resolver o problema. Se o problema continuar, tente remover o pacote virtualbox-4.2 .

sudo apt-get remove virtualbox-4.2