Unlock ESXi root account

I often see people, including myself, lock themselves out of the ESXi web-based host client. It only locks you out from ssh and the web console. Password lockout is NOT active on the console/DCUI. Below is how you reset the counter and regain access.

Procedure to unlock the ESXi root

First, you need to gain ILO/IMM/IPMI or physical access to the server.

1. At the console, press ALT+F1 to get to the ESXi shell. If a login shows up continue with step 3, otherwise continue with step 2. Change back to the login screen with ALT+F2.
2. Login to the DCUI (to enable the ESXi Shell if not already done)
   1. Login with root and the correct password.
   2. Go to Troubleshooting Options
   3. Select Enable ESXi Shell
   4. Press CTRL+ALT+F1
3. At the ESXi shell login with root and the password
4. Run the following command to unlock the root account:

pam_tally2 --user root --reset