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When "lsof" Utility Is Not Installed, How to Determine Which Process is Using a TCP Port on Sun Solaris Platforms (Doc ID 839919.1)

Last updated on FEBRUARY 28, 2024

Applies to:

Web Cache - Version to [Release AS10gR2]
Oracle Fusion Middleware - Version to [Release AS10gR2 to AS10gR3]
Oracle HTTP Server - Version to [Release AS10gR2 to AS10gR3]
Oracle Solaris on SPARC (64-bit)
Oracle Application Server 10g Enterprise Edition - Version: to
Sun Solaris SPARC (64-bit)


It is required to determine which process is listening on specific TCP port but lsof utility was not installed on Sun Solaris Platform and Web Administrator does not have privileges to install it.

This process may be preventing one of Oracle Application Server components from starting, for example, HTTP Server failed to start with the error reported in $ORACLE_HOME/Apache/Apache/logs/error_log:

This means that another process is listening on port which is HTTP Server listening port and it will not be able to start until freeing this port.

The command "netstat -an | grep port" can be used to verify if the port is in use, but now it is required to know which process is listening on this port.

netstat does not provide the PID of the process using the port, the command pfiles can provide this info using the below script.


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