web interface port for oracle 11g I am running a fresh Oracle 11g installation created on lunix redhat 5, but I forget the web interface port, I have already tried this https:// localhost:5500/em/ but did'nt work.

any help will be appreciated.
The default port used for dbcontrol is 1158. You may have changed the port though, of course.

The emctl control commands also display the 'about' URL which includes the port number. For example:

$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.3.0
Copyright (c) 1996, 2011 Oracle Corporation.  All rights reserved.
https://myhost.mydomain.com:1158/em/console/aboutApplication
...