Due to repeated failed login attempts via SSH a user account may get locked out. The following provides steps on how to reset the account (SUSE Linux).
If this is the only account you have access to via SSH then you may need to open the VM console via ESXi/vCenter and login as root user:
Displaying the number of failed attempts:
pam_tally2 -u username
Reset the account:
pam_tally2 -u mystic –reset
Sucessfull login attempt:
Note: If you are prepared to wait the account should unlock after ~15 minutes.