Oracle 12c Release 2 Database Configuration Assistant installation on CentOS - The port is already in use I know this error has already been intensively discussed in this thread here: Resolving port 5500 not free issue during Oracle 12c Release 2 Database Configuration Assistant installation on CentOS

However, despite the solutions proposed I can't install Oracle 12c on CentOS 7. 

I skiped the Database Configuration Assistant during standard installation process in order to run it again using Xming. There it is possible to enter the EM database express port manually.



I tried almost any port number, I always get the error message shown in the screenshot.

Do you have any suggestions what else I could do?

EDIT:

Content of /etc/hostname:

CentOS-Dev-db-12c.Company.local


Content of /etc/hosts:

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1       localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.113 CentOS-Dev-db-12c.Company.local
Oracle support doc [DBT-06103] The port (5,500) is already in use. ACTION: Specify a free port (Doc ID 2277154.1) says to put the unqualified hostname into /etc/hosts too. i.e:

192.168.10.113 CentOS-Dev-db-12c.Company.local CentOS-Dev-db-12c