List of commands I frequently use in Oracle

Listed below commands I fequently use on Oracle in Linux OS environment.
(I will keep updating as I come across more)...
Oracle Commands:

• .How to find whether listener is running or not? 
• lsnrctl status
• to start listener 
• lsnrctl start
• to stop listener
• lsnrctl stop 
• to list services
• lsnrctl services
  
• To Configure Listener
• from command prompt type netca
• to start dbconsole (Enterprise Manager Console)
• emctl start dbconsole
• to stop dbconsole
• emctl stop dbconsole
• to access Enterprise Manager
• https://<service_name>:1158/
• for example if your service name is my.example.com then access url will be https://my.example.com:1158/
• How to start Oracle dB?
• sqlplus /nolog
• sql> connect / as sysdba
• startup
• How to shutdown Oracle dB?
• shutdown immediate
• How to lock a user account & of course to unlock?  
• SQL> ALTER USER <username>  ACCOUNT LOCK;
• SQL> ALTER USER <username> ACCOUNT UNLOCK;
• If you want to change the password while you unlock, use the following command: 
• SQL> ALTER  USER <username> IDENTIFIED BY <password> ACCOUNT UNLOCK;