Definition: In the Bible, 'tmux_lt_2.1.conf' refers to a configuration file for Tmux (Terminal Multi-User Interface), a command-line interface for managing terminals on a Unix-like system. This configuration file sets up various settings for managing user sessions and terminal environments in Tmux. The term "TMUX" is from the Greek, meaning "terminal multi-user". In context, it's used to denote the terminal environment within Tmux, where multiple users can have access to the same terminal session or window simultaneously.