Lock Account

 set echo on
spool /home/admin/lockAccount.log
BEGIN
 FOR item IN ( SELECT USERNAME FROM DBA_USERS WHERE USERNAME NOT IN (
'SYS','SYSTEM') )
 LOOP
  dbms_output.put_line('Locking and Expiring: ' || item.USERNAME);
  execute immediate 'alter user ' || item.USERNAME || ' password expire account lock' ;
 END LOOP;
END;
/
spool off