I am horribly impatient and can't stand the (for me subjectively long) delay of around 2 seconds after entering an incorrect password in the login screen or also as
sudo password, before I can retry typing it correctly.
Is there a way to modify the delay and reduce it to around half a second or turn it completely off, both for
sudo and the login screen?
The optimal solution would include a longer delay after maybe 3 or 5 incorrect passwords, to still prevent brute-forcing.
PS: I am currently using vanilla Ubuntu 16.04 with Unity Desktop and lightdm.