Definition: The 'tmux.conf' file in Tmux can contain scripts that execute on terminal, for example: %homedir/home/username/.tmux/ . This command sets the path to the current directory as home directory and sets up a custom tmux session. Detailed definition of %homedir/home/username/.tmux/ is 'Home directory' in Tmux which acts like a folder within your application's main directory, usually called '~'. It can also refer to the location where you want your application to start running (your home directory) and the path where your tmux session lives.