My Configs for Kali Linux that I use for productivity.
To setup tmux. Ensure the following: the .tmux.conf is in your users home directory. Then launch tmux, do Ctrl+b then "I" to install the third party repos.
This enables copying, pasting,etc. Also the .zshrc config essentially provides the ip address of the tun0 interface and commands such as clipboard (which is an alias for copying).