"The only tool that stood the test of time is tmux."

tmux comes from BSD rather thsn GNU/Linux, or Windows

What is the default shell in OpenBSD

starship does not support it

   starship init ksh

   ksh is not yet supported by starship.
   For the time being, we support the following shells:
   * bash
   * elvish
   * fish
   * ion
   * powershell
   * tcsh
   * zsh
   * nu
   * xonsh
   * cmd

   Please open an issue in the starship repo if you would like to see support for ksh:
   https://github.com/starship/starship/issues/new