Restart EBS instance if everything is down

Start EBS Instance

Manually restart server if nothing is working like SSH, DB etc

Check if database listener is up or not
> lsnrctl status

Start listener if required using following
> lsnrctl start <DBID>

Connect to database using sysdb

> sqlplus / as sysdba
> startup

stop all services from $ADMIN_SCRIPTS_HOME

> adstpall.sh

start all services from $ADMIN_SCRIPTS_HOME

> adstrtall.sh