Setting listener.ora in Linux

To set up listener.ora file in linux follow these steps:

• change directory to oracle folder then network and admin folders consequtively: 
• cd /u01/oracle/product/11.2.0.4/db_1
• cd network
• cd admin
• run su command enter password (needed to edit listener.ora). open listener.ora to edit in your favorite editor. I used gedit:
• su
• gedit listener.ora

• configure listener.ora file (you need to set up HOST, PORT, ORACLE_HOME, SERVICE_NAME), here is a sample file configured for my needs:

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.201)(PORT = 1521))

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))    

    )

  )

SID_LIST_LISTENER = 

(SID_LIST = 

 (SID_DESC = 

(ORACLE_HOME = /u01/oracle/product/11.2.0.4/db_1/)

(SID_NAME = ORACLEVM)

(SERVICE_NAME = ORACLEVM)

(GLOBAL_NAME = ORACLEVM)

 ) 

) 

ADR_BASE_LISTENER = /u01/oracle

• stop ans start listener by using these commands:
• lsnrctl stop
• lsnrctl start