详细描述修改oracle密码。su - oracle SQL> alter user dbsnmp account unlock identified by oracle; SQL> alter user sysman account unlock identified by oracle; 如果EM不能用的话需要重建EM 重建EM的步骤如下：: 1、如果忘记了ASM的dbsnmp、sysman用户的密码，可以重新设置，执行下面的 SQL> alter user dbsnmp account unlock identified by oracle; SQL> alter user sysman account unlock identified by oracle;