How to reset the Weblogic admin server password

Step 1:
Set the following environment variables (update the domain name    as appropriate):
export FMW_HOME=/u01/app/oracle/product/middleware
export DOMAIN_HOME=$FMW_HOME/user_projects/domains/<domain_name>
export CLASSPATH=$CLASSPATH:$MW_HOME/wlserver_10.3/server/lib/weblogic.jar
Run the env as shown below.
. $DOMAIN_HOME/bin/setDomainEnv.sh
Step 2:
Shut down your weblogic domain:
$DOMAIN_HOME/bin/stopWebLogic.sh
Step 3:
Rename and backup the DefaultAuthenticatorInit.ldift file as shown below,
cd $DOMAIN_HOME/security
mv DefaultAuthenticatorInit.ldift DefaultAuthenticatorInit.ldift.old
Now run the following command to generate a new DefaultAuthenticatorInit.ldift file. ((here ‘weblogic’ is default username))
java weblogic.security.utils.AdminAccount <username> <new_password> .
Note: Don't forget the period "." at the end of the this command, otherwise you will get "Error: Invalid arguments"
Rename and backup the following LDAP directory.
mv $DOMAIN_HOME/servers/AdminServer/data/ldap $DOMAIN_HOME/servers/AdminServer/data/ldap.old
(This ldap directory will be recreated once weblogic server startup time)
Step 4:
Back and Edit the boot.properties file and update the new password. (Above new_password)
cd $DOMAIN_HOME/servers/AdminServer/security
cp boot.properties  boot.properties_old
vi boot.properties
password=<username>
username=<new_password>
(Note: New password will be encrypted once server starts)
Step 5:
Now start your weblogic domain.
[oracle@fa bin]# cd /root/MW_home/user_projects/domains/base_domain/bin/
[oracle@fa bin]# ls
nodemanager  nohup.out  server_migration  service_migration  setDomainEnv.sh
startManagedWebLogic.sh  startWebLogic.sh  stopManagedWebLogic.sh  stopWebLogic.sh
[oracle@fa bin]# nohup ./startWebLogic.sh &
[oracle@fa bin]# nohup: appending output to `nohup.out'
[oracle@fa bin]# tail -f nohup.out
Server state during the startup:
<Aug 7, 2013 11:07:18 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STANDBY>
<Aug 7, 2013 11:07:18 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STARTING>
<Aug 7, 2013 11:07:21 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to ADMIN>
<Aug 7, 2013 11:07:21 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RESUMING>
<Aug 7, 2013 11:07:22 AM IST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to RUNNING>
<Aug 7, 2013 11:07:22 AM IST> <Notice> <WebLogicServer> <BEA-000360> <Server started in RUNNING mode>