Resetting a forgotten ADMIN password on your Supermicro IPMI device when you are running VMware ESX 5.x is super easy, just follow these simple steps:
1) Download the IPMI tools from Supermicro’s site at: ftp://ftp.supermicro.com/utility/IPMICFG/
2) Extract zip archive and scp the Linux 64bit files over to your ESX server, either in /tmp or make the directory /opt/supermicro and store them there.
3) Change execute permissions on ipmicfg-linux.x86_64.static to RX
> chmod 750 ipmicfg-linux.x86_64.static
4) Run the following command:
> ./ipmicfg-linux.x86_64.static -user setpwd 2 somenewpassword