How to change ipmi password

You can use ipmitool and simple way for now is

[root@storinator ~]# ipmitool user set password 2
Password for user 2: 
Password for user 2: 

If you end up getting

IPMI command failed: Request data field length limit exceeded
Set User Password command failed (user 2)

Its because Supermicro does not permit simple passwords for BMC users unless they comply with requirements: use lowercase, capital, numbers and special characters