If I use sudo, and type my password in, I can continue to use sudo without my password for 15 minutes.
I know (per man sudoers) that I can edit the timeout by setting the timestamp_timeout value in /etc/sudoers. That's not my question.
My question is this: is that timeout counted from the first time I use sudo, or is it refreshed every time I use sudo?
sudo foo # at T; prompts for a password
sudo bar # at T+10m; no password required
sudo baz # at T+20m; does this prompt?