Make sudo ask for my password again?
Is there any way to make sudo forget my password instantly instead of remembering it for 5 minutes?
Edit your sudoers file by running visudo as root.
Look for the Defaults line, and add timestamp_timeout=0 to the end.
Eg.
Defaults env_reset,timestamp_timeout=0
(Edited: Sorry, got confused, had the wrong keyword. Fixed. )
If you just want to make sudo ask again for the current session
sudo -k