This can be done in two or three easy steps:

  1. sudo apt-get install zsh curl git
  2. sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
  3. (optional, must be installed for the agnoster theme for example (see here)) sudo apt-get install fonts-powerline (echo "\ue0b0 \u00b1 \ue0a0 \u27a6 \u2718 \u26a1 \u2699" to test)