Enterprise Manager Database Control URL - (orcl) :
https://redhat4.7:1158/em

[root@redhat4 install]# pwd
/u01/app/oracle/product/11.2.0/dbhome_1/install
[root@redhat4 install]# more portlist.ini
Enterprise Manager Console HTTP Port (orcl) = 1158
Enterprise Manager Agent Port (orcl) = 3938