1）檢視資料庫完整資訊：
srvctl config database -db database dbname
2）重啟資料庫：
srvctl  stop/start database -db dbname
3) 檢視資料庫服務是否執行正常在nodes上:
srvctl status service -db dbname
4) 檢視listener是否正常執行在nodes上：
srvctl status listener
5) 重啟listener
lsnrctl stop/start
6) 檢視listener service
lsnrctl services

7）檢視資料庫名字

srvctl config database

Clean up GI and RAC DB

The following is the steps to clean up the environment:

    stop database (srvctl stop database -d <DB_NAME> -o abort)
    deconfig crs

    #1. on every node except the first one,
    cd <GI_HOME>/crs/install
    ./rootcrs.pl -deconfig -force (run as root)

    #2. on the first node,
    cd <GI_HOME>/crs/install
    ./rootcrs.pl -deconfig -force -lastnode (run as root)

    clean up database (run as root)

    rm -rf /u01/app   (the location where <DB_HOME> and <GI_HOME> reside)
    rm -rf /etc/oracle
    rm -rf /etc/oratab
    rm -rf /etc/oraInst.loc
    rm -rf /var/tmp/.oracle
    rm -rf /var/opt/oracle
    rm -f /etc/init.d/ohasd
    rm -f /etc/init.d/init.ohasd
    rm -f /etc/init.d/init.tfs
   
    dd the disks if you have configured ASM
    reboot all hosts