/etc/services
 

Hi,

if I add new lines to /etc/services, are they instantly in use, or do I need to give some command to make changes active?

I'm using Centos3.

They are... only needed is you must start the daemon that is suppose to run using that port

/etc/services is used by xinetd. If the service is not started by xinetd then adding it to the /etc/services file doesn't matter.

Do you want the service to start via runlevels and init.d?

Specific information would also help.