How can I find port running Oracle Enterprise Manager

I need to connect to the Oracle Enterprise manager of a remote machine. But I dont know the port on which OEM is running on the remote machine. I have access to the machine from terminal though. Is there a command to see the port number OEM is running on. The remote machine is CentOS and I need to open the OEM on my local browser (I am running windows 10) I would really appreciate all the help. I am new to Oracle.