Para instalar por primera vez o actualizar los plugins con Vundle:

vim +BundleInstall! +BundleClean +qall

Para compilar por primera vez YouCompleteMe:

Compiling YCM with semantic support for C-family languages:

    cd ~/.vim/bundle/YouCompleteMe
    ./install.sh --clang-completer

Compiling YCM without semantic support for C-family languages:

    cd ~/.vim/bundle/YouCompleteMe
    ./install.sh