For oh-my-zsh

1. Add shrink-path to the plugins array in your .zshrc file:

   plugins=(... shrink-path)
   # suggest plugins=(git z sudo virtualenv shrink-path zsh-autosuggestions zsh-syntax-highlighting)
   

   zsh-autosuggestions and zsh-syntax-highlighting require you to install them manually
2. Copy omszt.zsh-theme to folder ${ZSH_THEMES:-~/.oh-my-zsh/themes}/:

   cp omszt.zsh-theme ${ZSH_THEMES:-~/.oh-my-zsh/themes}/
   

3. Set ZSH_THEME to omszt in your ~/.zshrc:

   ZSH_THEME="omszt"