1、手工启动：[oracle@crmdb ~]$ lsnrctl start[oracle@crmdb ~]$ dbstart[oracle@crmdb ~]$ emctl start dbconsole
2、应对shared memory realm does not exist 错误的处理1、实例没有启动sqlplus /nologconnect / as sysdbastartup
3、监听器启动出现问题：ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net Listener 使用oracle用户执行dbstart启动数据库提示如下：ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net ListenerUsage: /oracle/11g/bin/dbstart ORACLE_HOMEProcessing Database instance "orcl": log file /oracle/11g/startup.log修改dbstart以及dbshut两个文件