On EBS 12.2.X environments , if you are on R12.AD.C.Delta.7 and R12.TXK.C.Delta.7 or later, we can change Weblogic admin server password using the below script.
1. Startup admin server. Do not start any other services
$. ./EBSapps.env RUN
$ cd $ADMIN_SCRIPTS_HOME
$adadminsrvctl.sh start
$ cd $ADMIN_SCRIPTS_HOME
$adadminsrvctl.sh start
2. Run the below script
perl $FND_TOP/patch/115/bin/txkUpdateEBSDomain.pl -action=updateAdminPassword
[The script will prompt for Current and New Weblogic Password and restarts Weblogic admin server using the new password.]
3. Run fs_clone to propagate the changes to the alternate file system (Patch File system).
$adop phase=fs_clone