How to reset forgot RSC Password from Os level

Log in to the server do as below

===================RSC PASSWORD Reset===================================
root@BL04 # /usr/platform/SUNW,Sun-Fire-280R/rsc/rscadm usershow

 username            permissions        password
 --------            -----------        --------
 admin               cuar               Assigned

/usr/platform/SUNW,Sun-Fire-280R/rsc/rscadm userpassword admin