I use tmux on my server and recently I found to my cost that ctrl-d will exit tmux and lose all the session information, my intention was to simply end the ssh session but failed to notice I was still in tmux until too late.

I am aware that I should be careful in future when using ctrl-d but I wondered if there a way to prevent tmux for exiting when hitting ctrl-d by accident? A solution such as a prompt, confirmation or detaching would be fine.