Please use an unused port for this site error in Central Admin Site

My Central Administration site in MOSS environment was giving me following error message after restarting the server.

IIS was unable to start this site. Another site may already be using the port you configured for this site. Please use an unused port for this site.

Looks like changing the port number through IIS won’t do any good. You will have to do this through the command line. First navigate to following location

C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN

You need to use STSADM with setadminport parameter

Type stsadm.exe -o setadminport –port [port number]