Check used port – Linux

Sometimes you might find issues starting up your SAP services, with a error that the service is not able to bind to a particular port.

In the example below, I was not able to start the SMTP service from SMICM.

icm

This mean, there could be another service that is already using this port.

Lets find out:

netstat -nepal | grep 25

icm1

Now we have the process ID. Lets see what is this process all about:

ps -ef | grep 6760

icm2

Postfix was using my service, which was not required.

Kill/Stop the service that is not required before starting your service again.

In my example:

# postfix stop 

Make sure that you disable the unwanted service from starting up next time when you reboot the server using chkconfig:

# chkconfig postfix off

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