I was trying to start the Listener when … Welcome to LSNRCTL, type “help” for information. LSNRCTL> set curr LISTENER_DB Current Listener is LISTENER_DB LSNRCTL> start Starting /oracle/PIQ/112_64/bin/tnslsnr: please wait… TNSLSNR for IBM/AIX RISC System/6000: Version 11.2.0.3.0 – Production System parameter file is /oracle/DB/112_64/network/admin/listener.ora Log messages written to /oracle/diag/tnslsnr/host/listener_db/alert/log.xml Error listening on: (ADDRESS=(PROTOCOL=IPC)(KEY=DB.WORLD)) TNS-12555: TNS:permission denied TNS-12560: TNS:protocol adapter error TNS-00525: Insufficient privilege for operation IBM/AIX RISC System/6000 Error: 1: Not owner Then, I check whether the directory /var/tmp/.oracle or /tmp/.oracle there are in the server. After that, I renamed…