Install this plugin: https://github.com/yurenchen000/terminator-autotheme-plugin

  • Download the Python file.
  • Create the plugins directory:
    mkdir ~/.config/terminator/plugins
    
  • Copy the Python file into the plugins directory:
    mv ~/.config/terminator/auto_theme.py ~/.config/terminator/plugins/
    
  • Restart Terminator if it is open.
  • Go to Settings –> Plug-ins and then select Auto Theme.
  • Restart Terminator again and it will go into dark mode.

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