Change the delay time after a failed login attempt?

On Solaris, this can be changed in the /etc/default/login file. The default
is 4 seconds. In case you want no delay at all, change it to 0.

SLEEPTIME=0

On Linux, this can be configured in the /etc/login.defs file. The default
on Linux is 3 seconds.

FAIL_DELAY    0

But be careful. By changing this setting, a brute force attack might be easier