Ubuntu Close Cups Service

I use the ubuntu10.10 every time when the use of NMAP scan 127.0.0.1 can always find a 631 port open, in/etc/services found 631 port is the network printer service, but for me a normal user This is not necessary, So go to the Internet to search, found that the 631 port corresponding program is cups, but dare not uninstall, because some people on the internet said that the service has many packages are dependent on other programs. So uninstalling may be troublesome after manual sudo service cups stop to be able to temporarily play the effect, But the next time it will be turned on, and then thought of adding a command on the boot to stop the service, but did not succeed--, and then one day found that there is an init file/etc, there are many script files, then I saw a cups.conf file, open a look, Finally found a way to solve.
We can use VI to edit the cups.conf file and you will find these code
Start On (filesystem
and (started Dbus or RunLevel [2345])
and stopped Udevtrigger)
Stop on RunLevel [016]
Then my first approach is to check my current runlevel, command RunLevel, found to be 2, then I'll remove the 2 in the boot level and then add the 2 to stop there so that the next time it starts up at the RunLevel 2 o'clock the service will be stopped, and then I think, If you go to another runlevel, you don't have to turn it on again, so pound it off at all RunLevel, the final code is as follows
Start On (filesystem
and (started Dbus or runlevel [])
and stopped Udevtrigger)
Stop on RunLevel [0123456]
This way, when you log on to the system using NMAP scan, you won't see the 631-port.

Ubuntu Close Cups Service