If you forgot your admin user password for WebLogic, you can reset it this way. Ensure you are in the domain directory first!
source $WL_HOME/server/bin/setWLSEnv.sh
cd mydomain
mv security/DefaultAuthenticatorInit.ldift security/DefaultAuthenticatorInit.ldift.bak
java weblogic.security.utils.AdminAccount <admin_username> <new_password> security
