tmux attach session

$ tmux
## run the script
## ctrl+b then d # to exit
$ tmux list-sessions
$ tmux rename -t 2 djrn-test
$ tmux attach-session -t djrn-train

## $ for image in images/*.jpg; do j=${image#images/} j=${j%.jpg}; [[ -e keypoints/${j}_keypoints.json ]] || rm "$image"; done