what these files under /tmp/.oracle are used for?
today, I met a weird issue, when I tried to start a listener, get below errors:
TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
System parameter file is PATH/oracle/network/listener.ora
Log messages written to PATH/oracle/admin/tns_<SID>.log
Error listening on: (ADDRESS=(PROTOCOL=IPC)(KEY=O01GRP0))
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
the errors show it is caused by the permission issue, so I went to check the listener.ora and tns_<SID>.log by "ls -l". it has the write/read permission on these files.