OraRestart

=Stop DBs= To see which DB's are running do : If multiple databases do: export ORACLE_SID= and repeat steps above...
 * "ps -ef | grep pmon"
 * su to oracle, enter the appropriate DB, run:
 * sqlplus /nolog
 * connect / as sysdba
 * shutdown immediate

=Start DBs= To Start, login as above but instead of "shutdown immediate" do "startup".

=List DBs= To list all databases, find "oratab" file (i.e. /var/opt/oracle/oratab )
 * File Format : database_sid:oracle_home_dir:Y|N
 * Database_sid is the system id (SID)
 * Oracle_home_dir = ORACLE_HOME directory
 * Y|N is should automatically start @ boot