8 - if [ "$ZSH" = 4 ]; then sudo apt-get install zsh; fi
9 - if [ "$ZSH" = 5 ]; then wget http://downloads.sourceforge.net/project/zsh/zsh/5.0.7/zsh-5.0.7.tar.bz2; tar xf zsh-5.0.7.tar.bz2; cd zsh-5.0.7; ./configure && sudo make && sudo make install; cd ..; fi
10 - pip install --user cram