TNS-12555 TNS-12560 TNS-00525 Insufficient privilege for operation Listener does not start
Issue: Unable to start listener as it throws error as below: eul2006:oraSID 56> lsnrctl start LISTENER LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 07-FEB-2017 11:55:04 Copyright (c) 1991, 2010, Oracle. All rights reserved. Starting /oracleSID/SID/112_64/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.2.0 - Production System parameter file is /oracleSID/SID/112_64/network/admin/listener.oraLog messages written to /oracle/diag/tnslsnr/eul2006/listener/alert/log.xml Error listening on: (ADDRESS=(PROTOCOL=IPC)(KEY=SID.WORLD)) TNS-12555: TNS:permission denied TNS-12560: TNS:protocol adapter error TNS-00525: Insufficient privilege for operation Listener failed to startLinux Error: 1: Operation not permitted ee the error message(s) above..." Description: The reason for this issue could be if listener was not stopped correctly means got killed at OS level or any other thing. Solution. Just remove the all listener socket files of th...