The following error is reported when ORACLE10.2.0.1 listening is started in RedHat5.

Error during listener startup

[Oracle @ localhost ~] : Lsnctl start

TNSLSNR for Linux: Version 10.2.0.4.0-Production
System parameter file is/u01/app/oracle/network/admin/listener. ora
Log messages written to/u01/app/oracle/network/log/listener. log
Error listening on: (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1) ITPUB
TNS-12555: TNS: permission denied
TNS-12560: TNS: protocol adapter error
TNS-00525: Insufficient privilege for operation
Linux Error: 1: Operation not permitted

Error cause: the file. oracle file owner has an error. The file owner is root.

Solution: Change the oracle owner to an oracle user.

Specific Practices:

First, use strace lsnctl start to track the Startup Process of the listener and view the error location.

Next, use: Enter the/var/tmp directory to view the owner of the. oracle file. If it is root, use

Chown oracle: dba. oracle

Command to change its owner. If you do not have the permission, change it to the root user.