概述：oracle数据库的日常管理可以使用命令行及图形化界面进行管理；命令行的命令工具有sqlplus 、srvctl 、 crsctl 等命令，图形化界面有10g版本的EM dbconsole、11g版本的EM dbconsole、grid control 集中管理、12c版本中的EM express、cloud control集中管理；本文将对11g中的EM dbconsole工具进行简单安装介绍。

实验思路：

1、重建em

2、打开em管理界面进行查看

实验：

emca的具体命令

emca -help

[oracle@cube ~]$ emca

/u01/app/oracle/product/11.2.0/db_1/bin/emca [operation] [mode] [dbType] [flags] [parameters]

-h | --h | -help | --help: prints this help message 

-version: prints the version

-config dbcontrol db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure Database Control for a database

-config centralAgent (db | asm) [-cluster] [-silent] [parameters]: configure central agent management

-config all db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure both Database Control and central agent management

-deconfig dbcontrol db [-repos drop] [-cluster] [-silent] [parameters]: de-configure Database Control

-deconfig centralAgent (db | asm) [-cluster] [ -silent] [parameters]: de-configure central agent management

-deconfig all db [-repos drop] [-cluster] [-silent] [parameters]: de-configure both Database Control and central agent management

-addNode (db | asm) [-silent] [parameters]: configure EM for a newly added node for a database

-deleteNode (db | asm) [-silent] [parameters]: de-configure EM for for a database on node getting deleted

-addInst (db | asm) [-silent] [parameters]: configure EM for a new RAC instance

-deleteInst (db | asm) [-silent] [parameters]: de-configure EM for a specified RAC instance

-reconfig ports [-cluster] [parameters]: explicitly reassign Database Control ports

-reconfig dbcontrol -cluster [-silent] [parameters]: reconfigures RAC Database Control deployment

-displayConfig dbcontrol -cluster [-silent] [parameters]: displays information about the RAC Database Control configuration

-migrate -from dbcontrol -to centralAgent  [-repos drop] [-cluster] [-silent] [parameters]: migrates EM configuration from Database Control to central agent

-upgrade (db | asm | db_asm) [-cluster] [-silent] [parameters]: upgrades an earlier version of the EM configuration to the current version

-updateTargets crs [-silent] [parameters]: updates new crs home for all dbcontrol and central agents on crs upgrade

-restore (db | asm | db_asm) [-cluster] [-silent] [parameters]: restores the current version of the EM configuration to an earlier version

Parameters and Options:

[parameters]: [ -respFile fileName ] [ -paramName paramValue ]* 

db: perform configuration operation for a database (including databases that use ASM)

asm: perform configuration operation for an ASM-only instance

db_asm: perform upgrade/restore operation for a database and an ASM instance

-repos create: create a new Database Control repository

-repos drop: drop the current Database Control repository

-repos recreate: drop the current Database Control repository and recreate a new one

-cluster: perform configuration operation for a RAC database

-silent: perform configuration operation without prompting for parameters

-backup: configure automatic backup for a database

Parameters for single instance databases

ORACLE_HOSTNAME: Local hostname

SID: Database SID

PORT: Listener port number

ORACLE_HOME: Database ORACLE_HOME

LISTENER_OH: Listener ORACLE_HOME

HOST: Listener Host