When you use `sudo` but get your password wrong there an approximately 2 second delay (it's actually randomised a bit).

This serves no security purpose. In theory it would prevent dictionary attacks against your own password if an attack has access to your account. However that's nonsense for two reasons:

1. If an attacker has access to your account it's completely trivial to get your password - just alias `sudo` to `mitm_sudo` and wait.
2. You can check the current user's password using `unix_chkpwd` (which is how PAM does it). That program has no delay at all.

Therefore all the delay does is give a very annoying illusion of security.

Please can you disable the delay? I believe this can be done by removing this line in `/etc/pam.d/system-auth`:

    auth        required                                     pam_faildelay.so delay=2000000

It may make sense to keep the delay for local logins but not sudo. I'm not entirely sure how the `pam.d` configs work, but there is a `sudo` file in there (and also `sudo-i`?) so maybe that is possible.